Archive for the 'sound' Category

Portable Audio Recorders

May 10, 2010

For a few years now we have seen a wealth of portable audio recorders appear in the market. Most record two tracks at 96 kHz, 24 bit and have integrated stereo microphones.

While the 96 kHz, 24 bit suggests high quality audio recordings it is the integrated microphones that spoil it all.  Unfortunately not many manufacturers document the specs of the microphones on their devices. Even elementary information like whether the mics are cardioid or omni is often lacking. Instead we are left with descriptions like “Internal Stereo Microphone”. No noise performance indications or frequency response information. Clearly a sign most of these devices are not positioned as devices for the professional sound recordist.

Luckily a few websites come to our rescue. Of note here are www.wingfieldaudio.com who provide excellent noise floor samples and www.avisoft.com who provide both noise floor samples for a few models and EIN data for a fairly complete range of portable recorders available in the market today.

In my experience an Equivalent Input Noise number of -120dBu, unweighted and at maximum gain setting is the minimum for the field recordist to be able to make decent recordings. Also, a frequency response of 40Hz through 20kHz is a minimum specification to be met.

On the noise spec that rules out popular recorders such as the M-Audio Micro Track II and the Edirol R-09HR. These might prove effective in high dBFS music recording environments but are pretty useless to record in quiet environments.

Two recorders in my view perform particularly well: the Sony PCM-M10 and the Sony PCM-D1.

The PCM-M10 has very quiet omnidirectional built in microphones. Omnidirectional microphones are less sensitive to handling noise (nice to have on a handheld device) and have extended low frequency response.

The PCM-D1 has Analog Devices pre-amps that are virtually noiseless. The microphones are cardioids mounted in an XY coincident pattern. While this would suggest a narrow stereo field Sony managed somehow to overcome this and give recordings made this device a wide stereo image. Might be a device that is hard to find these days as it seems to have been discontinued in some countries in favor of the PCM-D50.

The microphones on both recorders are high sensitivity so dealing with quiet environments is no problem. The D1 has better high-end response compared to the M10.

Samples of recordings I made:

PCM-M10: JanuarySleet.wav, ThunderandRain.wav

PCM-D1: QuietForestSpringEvening.aif, LakeSide2.wav

Happy New Ears 2008

August 31, 2008

 

If you have the time and you if you’re in the neighborhood, go check out the excellent Happy New Ears festival for New Music held in Kortijk, Belgium from September 13 through September 28.

The Festival features some of the most important new music composers, sound artists and performers from around the world. 

Happy New Ears have set up a collaboration with  Freesound. For the Omni sound installation for children (and adults alike) several Freesound contributers, myself included, have submitted sound material. Go create and have a good time.

www.happynewears.be

Sonda Project Barcelona still online

April 15, 2007

Sonda Project Map

The Sonda Project which took place in Autumn 2005 at the Centre de Cultura Contemporània de Barcelona is still online. The project was part of the Zeppelin Festival de Proyectos Sonoros.

Check out my participation and those of other sound artists at the Sonda Project Page

CCCB