re: Home brew looper

["Denis Aldrich" <joy_top@hotmail.com>]

Hi L,
I've got a little more info on these chips.  The first problem is taken 
care 
of by a loop mode function of the chip.  The second problem is true that 
there is no overdub.

The biggest drawback is the 8khz sample rate.  This reduces the highest 
freq 
to a little over 3khz.  It is only telephone grade audio. Overdubs could 
be 
taken care of by using two chips and bouncing between the two.
Running the controls would take a small programable processor.
information is available at www.ISD.com
Denis


From:  "Dennis Leas" <dennis@mdbs.com>
Subject:  Re: Home brew looper

I think this the same chip used in the Jameco kits?  I remember looking at
these.  As I recall, there's two problems: 1) not an easy (i.e., built-in)
way to end recording and begin endless, looping playback and 2) no overdub
capability.

Nevertheless, it would be really cool to put together a DIY kit with one of
these chips and some "glue" components.  It would be fun to have a whole
bunch of little looper boxes, even if they didn't have a lot of features.

Dennis Leas
-------------------
dennis@mdbs.com

----- Original Message -----
From: "Denis Aldrich" <joy_top@hotmail.com>
>Anybody look at RadioShacks ISD 2500 Series chip for looping?  The chip is
>normally used for message machines.  The series stores 32, to 120 sec and
>cost about $20.
>Denis
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