Category Archives: One Sound Every Day

From July 28, 2008 – July 28, 2009 John Keston posted a sound every day in this category.

Rhodes Feedback

Posted on by
1

In order to get this example of feedback I ran my suitcase model Rhodes, which I confine to my studio, through an outboard processor with some nice amp modeling and cranked up the gain. For the processing I used an eleven year old Yamaha A3000 sampler. The A3000 allows you to edit and apply processing to an incoming signal and it has some pretty nice sounding effects. Once I had adjusted the processing I held down the sustain pedal on the Rhodes and let the amplification do the rest. Tapping or gently knocking the instrument also produced some nice sounds. Here’s a snippet of the results.

Rhodes Feedback

The Smallest Sample on ACB

Posted on by
3

This tiny sample of audio represents the instant that my iPod ran out of battery life while recording a performance of myself, Nils Westdal and Graham O’Brien on drums from Monday, November 17, 2008 at Cafe Barbette in Minneapolis.

Typically when a recording is interrupted due to power loss on a digital recorder, the device is unable to save the document properly so what you end up with is a corrupt file, or worse, nothing at all. In my case I ended up with a corrupt file on the iPod of about forty five minutes of our second set. After a minute or two of searching I discovered that Audacity has a file menu option called “Import Raw”. Using this option I was able to import the unreadable content into Audacity.

I was delighted to see that most of the recording was intact. However, what was was interesting to me is that at the end of the file was about a minute or more of random white noise. I fancifully imagined this as my iPod going into a dream state as the power level was no longer adequate to support the standard functionality of the device. So here’s the first 48 milliseconds of that dream state with a three dB pad to eliminate clipping.

Ghost in the Machine

Insectoid X-19

Posted on by
Reply

This afternoon I stumbled upon another one of my recent FM synthesis experiments from November 2, 2008. On that day I recorded eight minutes of output from select randomized programs that I produced using a MaxMSP patch called X.FM. You can hear all of the examples I have posted so far by clicking on the FM Synthesis topic.

This eighth example in the series has some nice rhythmic, pulsating characteristics to it. I edited the sound out from the surrounding audio, then exported it with normalization to boost the levels.

Insectoid X-19

 

Mangled, Reversed, Distant and Filtered Piano

Posted on by
Reply

Over processing usually leaves you with audio that lacks it original luster, or perhaps it starts to sound like the processor itself. However, sometimes you might end up with something interesting as a result of pushing the processing beyond the normal boundaries. While listening to the garbled piano in the last entry I could hear something haunting about the passage, so I decided that I would try to bring out those haunting characteristics by adding some unrestrained processing to the recording. I started by reversing it and pitching it down a couple of semitones. This brought out a brief harmonic minor melody. Later, after applying some extreme filtering and massive reverb I ended up with this thin, distant, and haunting sequence.

Mangled, Reversed, Distant, and Filtered Piano

iPod Garbled Piano Recording

Posted on by
Reply

I finally made a dock connector for my third generation iPod that I’ve been making experimental recordings on with Linux and an AT822 stereo mic. Prior to making the dock connector I was only able to make mono recordings via the headphone jack. Since the dock connector only accepts a line level signal, I am pre-amping the AT822 with my ailing Sony PCM-M1 DAT recorder (it eats tapes, so it’s a useful retirement).

With this setup I am able to use the otherwise useless DAT recorder by connecting the stereo mic to the mic input, putting the device in record mode, adjusting the levels, and then taking the line out to the dock connector on the iPod as shown in the photograph. The recordings are relatively clean except for a tiny bit of high frequency interference that I haven’t tracked down yet.

The only other problem is that recording in stereo seems to tax the resources of the iPod. When I try to record at a sampling rate higher than 44.1kHz the audio is likely to suffer from a bizarre digital jitter effect. Here’s an example of a piano recording at 88kHz that I played and edited together to illustrate the jitter problem. I wouldn’t use this rate for anything I want to record well, but I kind of like the stuttering sound it creates as the iPod fails to process the audio quickly enough to store it accurately.

iPod Garbled Piano Recording