[PD] small(est) hardware solution(s)

Derek Holzer derek at umatic.nl
Fri Jul 27 00:50:57 CEST 2007

How much memory/time do you need to record? The smallest/cheapest 
solutions don't require a computer at all. There are ISD voice recorder 
chips capable of recording messages up to 60 seconds at 8 Khz sampling 
rate. You can also record several different messages with a total time 
of 60 secs, which can be addressed via the controller pins of the chip. 
If you get the SMD version of this chip, it is only several mm across 
(but a PITA to solder!).

They run from $5 (cheap, on EBay sometimes even cheaper) to about $25 
(new, retail) per chip and depending on which version you use require 
very few external components and depending on the application may or may 
not need a microcontroller. There are simple plans for using them like a 
guitar loop pedal all over the internet already, as well as quite a few 
documented schematics for different applications.

I used a pile of them for some sound sculptures, documented on the last 
couple posts on my blog:



marius schebella wrote:
> I am helping a 
> friend of mine with an installation where we need to record and playback 
> speech into an old telephone. everything should ideally be built inside 
> the phone.

derek holzer ::: http://www.umatic.nl ::: http://blog.myspace.com/macumbista
---Oblique Strategy # 145:
"Slow preparation, fast execution"

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