Fenceposts and wires resonating, Port Noarlunga – Oct 2018

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Here’s excerpts of some unique recordings I made with a pair of Aquarian hydrophones. I was walking along the Onkaparinga River close to a fence line boundary when I passed what sounded like a pure wave. I realised this was coming from a fence post resonating from the vibration of fixed wires. I pressed my ear to listen closer. It sounded amazing!

I didn’t have any clamps to fix contact mics to the wire, so I decided to bury a pair of hydrophones at the base of two fenceposts. I positioned them so that they were flush and lightly making contact with the base of the post. Both resonances had fundamental frequencies of approx. 360 Hz, with a partial occuring at approx. 420 Hz when the wind picked up and articulated the wires.
I then decided to explore this further by examining the surrounding fenceposts.

Excerpt 2 is one of the initial fenceposts with another fencepost that presented a more complex resonance (423 Hz, 637 Hz, 720 Hz).

Excerpt 3 is another set of fenceposts which were far more subtle in resonance, but prone to perculiar artefacts, which (at this stage) I’m attributing to the wind and movement of sand around the base of the posts.

Excerpt 4 was at a point where the posts produced very complex resonances, and it became apparent that these were not so immediate, but rather, derived from activity occuring 50-100 metres along the wires. (the soft tapping you can hear is raindrops hitting the post, wires and sand.)

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Oblique Territories Journal – Part 5: Onkaparinga Gorge

This is the fifth instalment of a series of posts covering my a residency at Sauerbier House in Port Noarlunga which commenced in October 2018. As part of my preparation and ongoing research I am following the course of the Onkaparinga/Ngangkiparri river from its source to the sea.

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Onkaparinga Gorge: the (almost) final approach to Port Noarlunga

A preface

This post will be a little shorter than the previous ones which have documented my stops along the course of the Onkaparinga/Ngangkiparri River. The last post (covering trips to Mount Bold Reservoir and Clarendon) was written over three weeks ago and in the interim between then and now I’ve commenced my residency at Sauerbier House in Port Noarlunga. Understandably, time (and energy) have gotten away from me. We still managed to get out to our next designated stop at Onkaparinga Gorge on Sunday, but the time/energy reserves simply can’t produce something as in-depth and literate as the previous posts. I’m just a bit too consumed by the work at hand whilst in residence.

Nevertheless, I’m still committed to completing this journey to the best of my ability and to continue making observations and documenting the process.

Onkaparinga Gorge

I was again joined by my partner Lauren for this trip and the weather was ideal for a long-ish walk through the Onkaparinga National Park. To get to the gorge on foot within a reasonable timeframe, the best access points are via Gates 11 and 12 up Penny Hill Road (via Hackham). Being the weekend we expected a decent amount of visitors, but the more remote access points were certainly going to be less busy than the main gate and the lower lookouts.

We made our way down to the gorge via one of the Sundew Tracks which passed over a plateau of sparse vegetation before coming to a lookout that provided a wonderful vantage point of the gorge and river below. The contrast between the landscape of remnant vegetation and the surrounding pastoral land was striking. Our previous stop in Clarendon was probably only about five kilometres from this point (due east-ish).

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A view looking east from the Sundew Look out.

From here, we continued onto the gorge and river as the track narrowed considerably. The vegetation became much denser as the path zig-zagged down progressively steeper gradients. Eventually we arrived at the river’s edge.

This part of the gorge was a stunning landscape. On our way down we had occasionally heard the river flowing, but from a distance (and a given vantage) it appeared completely motionless. Up close, we could perceive a steady current coursing through the river, evidenced by visible fronts on the surface of the water. At its edges, the sun streamed through a honey-tinged transparance that revealed a silty floor, rocks and felled branches covered in slime and moss. Little insects could occasionally be seen skirting the surface. Large boulders and sloping rocks provided nice vantage points, whilst paths wound through grasses led to little coves and other secluded areas. A swinging rope had been suspended from a branch of a large eucalypt. A platform to swing from it out over the river came in the form of one of the enormous boulders. I took my shoes off and gave it a go, making two complete swings before misjudging my return on the third trip and bashing my toe into a rock. Lauren proceeded to audibly roll her eyes. I do this kind of thing a lot. Thankfully I didn’t injure myself too much and the grotesquely cracked nail on my big toe looked a lot worse than it actually felt.

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Since I knew that this trip on-foot would a bit more intensive than the previous ones, I couldn’t bear the thought of carrying a tripod and mic rig up-and-down about two kilometres of a steep path. Even though Lauren was with me, it seemed like a bit more of an imposition to ask her to carry extra gear when the priority was lightness. So, I kept gear a little more practical this time around: my new Aquarian hydrophones, the Sound Devices Mix Pre 3 recorder and my handheld LS-100 recorder.

This was only the second time I’d used my new hydrophones and the results were absolutely brilliant. There’s a considerably stronger low-to-mid frequency response with these which really brings so much more presence to the recording. This aspect had been sorely lacking from my previous hydrophone pair, and although I could subsequently boost these lower frequency bands in post-production, having all of the audio’s constituent parts revealed in-situ makes the process of monitoring and observing environments so much more enjoyable!

With the hydrophones dropped in the river, the currents which we’d seen were certainly audible – a consistent throb of motion, joined by rivulets of sibilant activity. Surrounding this, water skimmers panned across the hydrophones stereo profile, whilst other creatures prowled the water and floor of the river, occasionally making contact with the mics.

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I made a couple of open-air recordings with the hand-held recorder, positioned with a little tripod. I’ve only listened back to these recordings once (time has been a bit limited this week), but the serenity of this location is certainly evident – the ambience of the river flowing, varieties of finches and wrens sounding out and the chatter of insects.

Although we passed other visitors coming and going on the Sundew Track as we made our way down to the gorge, it seemed remarkable that we managed to have the riverside location to ourselves for a bit over an hour; almost completely uninterrupted.

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An excellent trip – certainly the highlight on these roadtrips.

From here, I’ll be picking up the final stage of the journey by covering Old Noarlunga and then walking along the river to Sauerbier House in Port Noarlunga, followed by a short walk to the estuary.

 

Oblique Territories Journal – Part 4: leaving the hills

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This is the fourth instalment of a series of posts covering my preparation (and eventual work) for a residency at Sauerbier House in Port Noarlunga commencing in October 2018. As part of my preparation and research I am following the course of the Onkaparinga/Ngangkiparri river from its source to the sea.

Bad weather/good weather/injuries

Given that the weather in the broader Adelaide-region was absolutely abysmal on Saturday, I decided to be sensible and defer this road trip to Monday. This promised much better weather conditions and would also allow me to take it easy and do what one should do on a Saturday morning: ideally nothing at all. Another factor which moved the road trip to Monday was due to a bicycle accident I had a couple of days prior, resulting in a series of bruises on my right side and a graze on my elbow which – by Friday night – had turned into a gross and concerning infection. So, although Saturday didn’t involve observing and recording locations, it did involve trying to hastily see a doctor who could provide some much needed antibiotics.

By the time Monday came around, the infection had been banished and I was refreshed enough to hit the road once again; continuing to follow the course of the Onkaparinga River from its source to the sea.

My partner Lauren joined me this time around and given the ridiculously beautiful weather, it was a great opportunity for us to get out of the city for a few hours and do the things that couples do in the Adelaide Hills: fill the car with recording equipment; carry around recording equipment; untangle recording equipment; and waste precious time explaining to strangers what it is that you’re doing with said recording equipment.

My previous road trip had ended south of Mylor at the Valley Of Delights, as the river crashed over a weir, rounded sandstone cliffs and continued its passage through the remote (and practically inaccessible) regions of May Valley and Black Rock. Examining Google Maps, the river narrows considerably through this region before meeting a huge body of water. This body of water would be the first designated stop on Monday’s road trip.

Mount Bold Reservoir

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Mount Bold Reservoir is located a few kilometres east of Clarendon in the lower Adelaide Hills. The reservoir was constructed from 1932-1938, is the largest in South Australia (approx. 3.1 sq km) and supplies the bulk of Adelaide’s water supply. The only point of public access (that I know of) is the lookout adjacent to the dam wall at the southwestern fringe of the reservoir.

Pulling into the car park, it was the valley surrounding the dam wall that first caught my attention. It’s a stunning landscape; and the scale of it (in terms of height, distance and space in between) left me slightly awestruck. Speaking of scale, the dam wall is certainly imposing. Engineering feats like this always make me marvel at the degree of human ingenuity involved in taming and withholding the forces of nature – for better or worse. At the base of the wall, a continuous roar filled the air as a continuous jet of water was discharged from the wall’s valve chamber.

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We had hoped to make our way down to a rope bridge that was suspended over the water, which would have made for a great recording. Unfortunately, it was closed off for maintenance so I was left to survey the area from above. I set up my stereo rig at the southern end of the dam wall (via a walkway) and clamped a contact mic to the guard rail to capture gusts of wind that were blowing across it. These gusts of wind certainly put the windjammers on the stereo rig to the test. The wind was strong enough for me to ensure that all of my gear was secure and not partial to blowing into watery oblivion below.

The challenges of a stereo field

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Since upgrading my field recording set up from a handheld recorder to the adjustable stereo rig, I’ve realised that I’ve got a lot more to learn about recording environments. Because I’d used stereo handheld recorders for most of my field recording practice (Edirol HR09 [2010-2013], Olympus LS-100 [2013-2017] I’d obviously grown accustomed to the non-flexibility of the stereo arrangement of these devices – which have the microphones set in fixed positions. Much like a musical instrument, I’d gradually taught myself how to best manoeuvre it, whilst accepting it limitations of both the device (and myself.) By upgrading to the rig I had greater flexibility: I could now fully adjust the stereo field. However, once I’d gotten over the initial thrill of this, I gradually realised that this presented some new challenges. Now that I was able to broaden or tighten the stereo field, I found myself listening to environments in a completely different way than before, and realised that in order to faithfully capture environments, I would have to pay closer attention to everything.

With flexibility comes great responsibility.

I believe that through this process, I’ve become far more aware of just how weirdly sound can behave in particular environments and how much care I must take with regard to the recording process. I’m not simply pointing, recording and capturing sound anymore; I have to work with it, manoeuvre with it sympathetically, whilst monitoring and listening more attentively. In my previous post, I’d observed the peculiar phasing effect that was apparent whilst recording beneath the Princess Highway bridges. I’d attributed this to a combination of factors: my position in relation to the underside of the bridge and the river; the positioning of the mics; and what I was hearing via the rig against what I heard with my naked ears.

A dam wall situated in a narrow valley is a unique acoustic space and its slippery  characteristics were certainly emphasised by the way the roar of the water below could be perceived, depending on the position of your body/head in relation to the source of the sound and the erratic behaviour of the wind. In a given position, only a low resonance could be perceived; in another, the roar enveloped my body; then, the wind would pick up and it would appear as if frequency bands of the sound were breaking apart and swirling around. With complex and volatile acoustic properties like this, a humble stereo set-up doesn’t stand any chance of faithfully capturing what’s occurring. For this situation, something like a binaural dummy head or one of Rode’s new innovative ambisonic microphone arrays would have been more appropriate.

Obviously, a stereo field (fixed or versatile) will not replicate what we apprehend with our ears; and at best, can only render a faithful impression of an environment.

What did the recordings with the stereo rig sound like? Messy. As I was monitoring the recordings on the dam wall I realised I would need a good couple of hours (and possibly consultation from expert peers) to figure out how to record this location satisfactorily. At the very least, I did have an impression of the roaring water to the south, the relative tranquillity of still waters on the other side of the wall, and a hell of a lot of wind in between.

Whilst we couldn’t visit the site where the Onkaparinga River flowed into the reservoir (near Black Rock) we could certainly see where it left the reservoir: just a bit beyond the roaring jetstream below, forming the semblance of a crooked river and continuing its passage through the valley.

As we made our way to Clarendon we encountered the river flowing beneath a shallow bridge leading out of the wider reservoir district. I set up the recorder to capture the river’s flow and surrounding birdlife, whilst Lauren took pictures of a dozing possum in a nearby eucalypt.

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Clarendon

Upon arriving in Clarendon, we were less than enthused to find that the bakery was closed. Following a good pummeling by the wind and energies spent wandering around the reservoir area, a pasty and doughnut seemed like the world’s best kind of sustenance. Instead, we put our grumbling stomachs aside (not literally) and wandered down to where the river passed through a large reserve.

Ah, Clarendon. This is a beautiful little town that was established in the early days of European settlement. The last time we had been here was on my birthday earlier in the year. We feasted on pasties and doughnuts, inspected the local buildings, and then drove onto Kangarillia to down a couple of beers. One of the things that I like most about this town is the steep hills and valleys that surround it. Without trying to sounding too whimsical, it definitely has an enchanted feel to it; like a small Ye Olde Village with faeries and sprites hiding just out of sight. Of course, I’m certain it’s got a dark underbelly radiating some seriously bad vibes. Everywhere does.

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As I made a recording just above the banks of the river, I spotted a burnt out car slumped near a fat concrete pipe which led to an imposing wall laced with razor wire. Indeed: venture off the main road in a given town and the enchantment of a place ends there.

This observation was however a minor schism within the overall loveliness of the place. Further downstream, a school group on excursion were exploring the river with nets and notebooks, mucking about and trying to scare the shit out of each other. Despite my initial concerns, this actually made for a good (albeit, slightly obnoxious) recording. The whimsy of children can only sustain so much patience though, so Lauren and I made our way around the reserve to a secluded spot surrounded by reeds with steep cliffs looming above.

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In this spot, I set up the recorder, put my headphones on, blissed out slightly and gazed up at the cliffs dappled with ivy, bushes and little nooks. On top of the cliffs, thin clouds passed slowly though the clear blue sky as craggy old olive trees rustled in the breeze. Birds sounded out around us and frogs at either end of the creek started up in tentative bursts. Eventually the kids finished up their excursion and approached on the periphery. Through my headphones their approach sounded terrifying! Then I realised I’d had my headphone volume up way too high in relation to the actual (real world) volume level. Such was the lovely ambience of the riverside, that I’d gradually cranked up the volume to further immerse myself in it.

Beware the seductive quality of microphones and headphones in the real world. The ontological slippages can occasionally be a little unsettling.

Next time: The final approach – Onkaparinga National Park.

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Oblique Territories Journal – Part 3: semblance of a river

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This is the third instalment of a series of posts covering my preparation (and eventual work) for a residency at Sauerbier House in Port Noarlunga commencing in October 2018. As part of my preparation and research I am following the course of the Onkaparinga/Ngangkiparri river from its source to the sea.

Spring is here, Winter begone

On the first day of Spring I hauled back up the Princess Highway to continue following the Onkaparinga River from its source to the sea. The previous weekend trip to Springhead offered an early hint of glorious Spring weather and this Saturday’s trip held a similar promise, aside from some rather ominous looking black clouds hovering over the hills.

If spending a lot of time travelling around the Fleurieu Peninsula has taught me anything about the unreliability of the weather, it is to prepare for encounters with wind and rain. If I’m not well equipped I can become miserable very quickly. With this in mind, I brought a light rain jacket with me and a sturdy pair of hiking boots, the latter being impervious to virtually any substance on the planet. They’ve tramped through mud, snow, sand, rivers, swamps, seawater, horseshit and could probably handle a bit of fire too.

Along with my trusty handheld recorder (Olympus LS-100) which accompanied me last weekend, I’d also brought along a more professional recording setup of a Sound Devices recorder along with a matched pair of Line Audio CM3 microphones, accompanied by lots of wind protection. Aside from greater fidelity, the rig is especially handy when it comes to positioning the microphones in agile stereo formations that might best capture an environment.

Taminga Road (avoiding Hahndorf)

Following the previous weekend’s trip which ended with a frustrating stopover at the Verdun bridge, I had to work out where to head next. From Verdun, the river narrows and winds to the east, reaching the outskirts of Hahndorf. On a close examination of Google Maps I saw that the river turned south of the township and widened considerably, passing beneath Mount Barker road and the Princess Highway. For some reason I’d imagined that the river passed through Hahndorf (confusing it with another creek) and I couldn’t be more relieved when I realised that it avoided the town altogether. Hahndorf is pretty busy on weekends when it’s clotted with visitors. Further amplifying this negative observation, a strong anti-social disposition had permeated the previous week and the last thing I wanted was to be was in the proximity of, well…people. Especially when I was trying to locate and spend time with a river. Thankfully, relative solitude resulted. The Onkaparinga ran in wonky parallel with Taminga Road – a dirt road leading to several farming properties to the south of the Princess Highway. At a sharp bend, the road led beneath two bridges and a steep slope ran down to the banks of the river. I parked the car a short distance away, swapped my suede shoes for the indestructible boots, gathered up my gear and sought out a location beneath the bridge.

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Spaced stereo array beneath the Princess Highway

Actually, that should be bridges. Two bridges constitute each side of the highway and were separated by a gap of about twenty metres. Between the bridges, the river below encountered clusters of rock, vegetation and felled trees and made a gentle roar. Above this, I could hear the traffic streaming overhead on both sides, the vehicles running over uneven surfaces and eliciting percussive thuds.

There was a beautifully incongruous feel to this place. If it weren’t for the audible presence of civilisation, this clash of natural beauty and imposing infrastructure made you feel a bit like you were wandering around ‘the zone’ in Tarkovsky’s Stalker.

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Ideally, I would have liked to have set up my rig between the bridges to capture the river centrally and the sound of traffic evenly on both sides. Unfortunately, as I tramped through thorny weeds and blackberry to set up my tripod a light rain began to fall over the area. When the rain refused to let up I compromised and drifted over to the shelter of the southern bridge.

I was troubled by the first couple of recordings. It could have been my microphone positioning (a wide stereo profile at 45 degrees from each other) but I believe there was some peculiar acoustic activity going on. This was a unique acoustic space. The sibilant churning of the river propagated up the banks and reflected subtly off the concrete pylons and underside of the road. With the roar and percussive thrumming of traffic adding to the mix, I gathered that there was some odd phase cancellation going on which made the sound of the river appear to ‘drop out’ slightly – like a weak radio static.

After making a couple of recordings, I edged a little further down the slope and attempted to make another recording which I thought might emphasise more of the river and less of the road. However, by this point no amount of improvisation with the tripod would prevent my rig (and myself) from tumbling into the river below. I took out my handheld recorder and carefully slid down on my arse towards the bank of the river.

The rain had now ceased and the sun illuminated everything in an awfully photogenic light. No filter indeed:

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Following a slightly frustrating experience recording the river last weekend, it was wonderful to get up close to the activity of the water; capturing its dynamics as it sluiced, gurgled and churned around rocks and through vegetation.

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Going handheld at the river’s edge

Following a near-miss via a slippery rock, I took this as sign to move on. I clambered back up the slope and continued south along River Road towards Mylor.

The Mother’s River

I had two sites to visit near Mylor – Goyder’s Reserve and the mysteriously named Valley Of Delights. Also on my agenda was a visit to the town’s general store to purchase a copy of The Mother’s River by Tom Dyster. I’d previously borrowed a copy of this book from the library and it was Dyster’s informative book that revealed the source of the Onkaparinga River in Springhead. Dyster’s manuscript for The Mother’s River was written during the 1980s and 1990s, following Dyster’s travels along the river course. Following Dyster’s passing in 2011, the manuscript was compiled into a book and published posthumously by the Mylor History Group in 2016.

Goyder’s Reserve & The Valley Of Delights

I drove south of Mylor and pulled into a cramped parking area overlooking Goyder’s Reserve – a large open space on the banks of the Onkaparinga River. Enormous eucalypt trunks lay across the area with equally enormous eucalypts towering above. During the warmer months I imagined that this was a popular picnic area for families to visit. The parents could crack a bottle in the shade whilst their kids could go nuts clambering over the felled trunks and finding bugs everywhere. Cockatoos and kookaburras made a wonderful racket as I gathered up my gear and tramped over to the river’s edge.

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The river looked and sounded wonderful here as its strong current approached from a couple of bends and encountered a stretch of sandy banks. I had arranged the microphones in a wide stereo formation to emphasise the motion of the river as other birds (wattle birds, finches, honeyeaters) joined in the aforementioned avian racket.

Now it was time to head to the Valley Of Delights. This was featured in the first chapter of Dyster’s book, and given that it fell out of sequence with the source-to-sea structure of the book I gathered that this must have meant it was a special place.

Heading further south along Silver Lake Road I passed the Mylor Baptist Camp  and arrived at the end of the road with more signs of Christian indoctrination, albeit somewhat oblique:

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To locate the Valley Of Delights I had to continue on foot for another few hundred metres down the communal driveway of a couple of properties. One appeared to be cultivating a monumental amount of cacti out of their garage. As I located the path down to the valley an angle grinder fired up and I was reminded (for the first time on this trip) of suburban  existence. If a leaf blower had started up I would be right back in my suburb of Parkside, or actually anywhere vaguely urban.

Thankfully, the grinding abated by the time I reached the valley. A roar of water came from a weir to the north, whilst I was taken aback by the impressive sight of a sandstone cliff, mottled with lichen that rose over the river.

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Here’s a close-up of the cliff:

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I spent about an hour-and-a-half in the valley taking a load of photos/video and making recordings along the western side of the river bank; from the weir to the north, along a calm passage at the river bend, then at the southernmost edge of the bank where a roiling cascade could be heard in the distance. Looking across the valley, I saw indications of recent flood inundation with vegetation bent over and clumps of natural detritus tangled in skeletal bushes, which I mistook for enormous spider nests.

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I could have spent another hour in this space, but time was getting away from me (I was on a tight non-art schedule) and I had to head back to the city. There’s some excellent recordings from this visit and I’m looking forward to going back to them at some point.

Next time: Mount Bold Reservoir and Clarendon.

 

 

 

 

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Fleurieu Sound Map: Hydrophones update!

This episode of the FSM video blog documents the inclusion of some hydrophone recordings made across the Fleurieu region. As well as covering some background with DIY and JrF models, there’s some excerpts of the recordings; which you can listen to in their entirety over at the sound map.

Fleurieu Sound Map: Ingalalla Falls & Second Valley Forest Reserve

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For a while there – let’s say most of 2016 and the start of this year – it almost seemed like the Fleurieu Sound Map wouldn’t continue. As several blog posts had indicated, at various points from 2015 to mid-2017 I was hugely unhappy with my creative practice for several reasons and on several occassions I felt compelled to put several projects and possibly the entire thing on ice for an indefinite period.

Well, how things have changed! I’ve overcome my discontent, and as (another) several posts have indicated I’m back with it and fully engaged with things, feeling a genuine passion for things again. Insofar, the sound map is resuming with a bunch of new and archived recordings being prepared for documentation. It’s a really, really good time at the moment and I’m having a ball getting the FSM back up and running again.

So, with that in mind here’s a sonic apperitif comprising of two new site recordings, from Ingalalla Falls and Second Valley Forest Reserve respectively. I’ve also added a bit more depth to the field notes accompanying the sites, which previously have felt a bit too concise. Follow the link below and click on Updates to find the new ones.

http://www.tristanlouthrobins.com/fleurieu_soundmap/index.html

More is to come – I’d forgotten how time consuming the post-production process is with HTML-ing, audio uploads and pinning the things on Google Maps. I’ve got some little audio snapshopts from Parawa and Torrens Vale (done on the same road trip) and also more recent recordings from my Mum’s property which feature the new Sound Devices Mix Pre-3.

In the meantime, check out the new additions to the soundmap and make sure you also check out my new video blog covering the visits to these sites!

 

 

FLEURIEU: Nodes/Old Waters

Another new realease. “Nodes/Old Waters” is a meeting of sorts – a studio improvised amalgam of live instruments, Fleurieu field recordings and samples from old red_robin tracks. Listen/purchase below.

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