home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: sci.electronics
- Path: sparky!uunet!usc!howland.reston.ans.net!sol.ctr.columbia.edu!The-Star.honeywell.com!umn.edu!news
- From: Mike Diack <mike-d@staff.tc.umn.edu>
- Subject: Re: Recording sound on chip
- Message-ID: <C1FwtG.6or@news2.cis.umn.edu>
- X-Xxdate: Tue, 26 Jan 93 15:50:15 GMT
- Sender: news@news2.cis.umn.edu (Usenet News Administration)
- Nntp-Posting-Host: dialup-slip-1-18.gw.umn.edu
- Organization: persian cat & carpet co.
- X-Useragent: Nuntius v1.1.1d7
- References: <1993Jan25.214046.9622@hplabsz.hpl.hp.com>
- Date: Tue, 26 Jan 1993 02:41:37 GMT
- Lines: 27
-
- In article <1993Jan25.214046.9622@hplabsz.hpl.hp.com> S.
- Sivaramakrishnan, sivaram@hplabsz.hpl.hp.com 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?
- >
- Items 1 and 6 (&7 of course) are a bit tricky, but most of the rest is
- achieved by a whole bunch of chips from OKI. Some examples :
- MSM6308 : A/D,D/A + control circuitry for a 256k DRAM
- MSM6309 : A/D,D/A + control circuitry for a 256k SRAM
- MSM6322 : All the above + pitch change as well !
- There are dozens of them , of varying capabilities
- You may also consider the ISD analog storage devices
- OKI : 1-800-TEAM-OKI (lotsa colour glossies)
- cheers
- Mike
-