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- Path: sparky!uunet!mcsun!sunic!chalmers.se!news.chalmers.se!dtek.chalmers.se!d2bohre
- From: d2bohre@dtek.chalmers.se (Henrik Bohre)
- Newsgroups: sci.electronics
- Subject: Re: Recording sound on chip
- Message-ID: <d2bohre.728046764@dtek.chalmers.se>
- Date: 26 Jan 93 11:12:44 GMT
- References: <1993Jan25.214046.9622@hplabsz.hpl.hp.com>
- Sender: news@news.chalmers.se
- Organization: Chalmers University of Technology, Gothenburg Sweden
- Lines: 34
- Nntp-Posting-Host: hacke5.dtek.chalmers.se
-
- sivaram@hplabsz.hpl.hp.com (S. Sivaramakrishnan) writes:
-
- >I am looking for a cheap method to record and playback about 15 seconds of
- >sound on a chip.
-
- >The whole setup, I GUESS, will comprise:
- >1) A microphone
- >2) An A/D converter that digitizes the sound
- >3) A unit that accepts the commands "record" and "playback"
- >4) Some memory that holds the sound image
- >5) A D/A converter to generate an analog signal
- >6) A speaker for playback
- >7) Power supply
-
- >Does a chip that has most/all the features except the power supply exist?
-
- >If there is an alternative/better method I would be extremely interested to
- >know.
-
- >Sivaram
-
- There's a chip that does almost exactly what you want. The chip contains
- microphone amp, ADC, memory, DAC, speaker amp, and control logic. Ofcourse
- I don't remember the name exactly, but I think it was something like:
- "ISDNxx12" for 12 seconds recording with x bps
- "ISDNxx24" for 24 seconds recording with x/2 bps.
- The memory was some kind of analogue memory with 128 different states, if I
- remember it correctly.
-
- Mail me if you want further imformation about the chip.
-
- Henrik Bohre
-
- @>-+--
-