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Voice Chips

Discussion in 'Electronic Design' started by Galsaba, Dec 25, 2003.

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  1. Galsaba

    Galsaba Guest

    I am trying to find a voice chip that can record a song (not just melody).
    Anyone knows where can I find it?
    May be there is a company that will record songs on tiny chips, the kind that
    can go on greeting cards?


  2. Leon Heller

    Leon Heller Guest

    ISD makes these chips:

    They are quite easy to use.

  3. me

    me Guest

  4. The "must have" toy for this Xmas is some new kind of Walkman that
    apparently digitally stores as many as 10,000 songs! I'd be interested
    to know the amount of memory that takes and the quality of the sound.
    Somehow I can't imagine it being much good.
  5. Tim Shoppa

    Tim Shoppa Guest

    The ISD chips sold by the hobbyist outlets are usually the low-bandwidth
    high-recording-time versions. The higher-fidelity-shorter-recording-time
    versions (3.4kHz bandwidth) do a passable job with music, sounding
    much better than the low-bandwidth versions but still not as good as a
    BCB AM station (which can be 10kHz bandwidth).

    If you have a fixed song and a microcontroller with D/A, and a largish
    serial EEPROM, 10kHz mono 8-bit ulaw encoded audio (comparable to a
    BCB AM broadcast) for 6 seconds will fit in a 128Kbyte
    EEPROM. Above that you probably want to look into MP3 decoders, assuming that
    the device will play only a pre-encoded MP3 and not have to encode it.

  6. Portable MP3 player, about twice the size of a car alarm remote control. I
    got each of my kids one this year. They plug into a USB port, and the cheap
    ones I bought (around $100 each) hold two hours of music.
  7. A small hard disk drive. A single CD holds about 100-150 MP3 songs, so
    for 10,000 you're looking at around 40G. Last time I went on a long
    trip I put all the music I wanted on a couple of CD-Rs and a ~30Hr
    instructional program on two more. It took a few tries to RIP the
    latter acceptably, the first try I used too much compression even for
    voice (irritating artifacts) and the second time I found my Panasonic
    portable MP3 player couldn't cope with very large numbers of files so
    I had to group them. Still, it beats hauling dozens of original CDs
    around and I only had to do it once.

    The new portable MP3 CD players use much more efficient chip sets. On
    older models, the play time from an NiMH charge was LESS for MP3 files
    because of the massive amount of processing required, now it is MORE
    since they shut down the motor down most of the time.

    Best regards,
    Spehro Pefhany
  8. No, no, no! MP3 is history. These things sell for the equivalent of
    500 bux in your dough - not the same thing at all. Wish I could
    remember what they're called... :-|
  9. onestone

    onestone Guest

    Well the world seems enamoured with MP3, and the quality of that is pure

  10. onestone

    onestone Guest

    Well 12 bit PCM froma 16 bit sample, would give great quality, but for
    stereo sound you'd need around 88400 16 bit samples per second, stored
    as 66300, or 132600bytes per second. Given an average song of 4 minutes,
    or 240 seconds, or 31.824Mbytes of memory. Thus without the distorting
    compression of MP3 a 1Gb memory card could hold approximately 32 high
    quality songs recordings. Now, I don't know who might seriously need to
    wander around with 10,000 songs ready to hand (especially shitty quality
    songs) but a couple of hours of decent quality sounds good. remove the
    PCM and there'd be a little less room, but better quality, probably at
    least on a par with CD. So that begs the question why would people WANT
    to pay hundrefds of dollars for an MP3 player, when they can get a
    memory card for the same money and get better quality?

  11. Galsaba

    Galsaba Guest

    I am afraid most of the responses I got here did not really point to the
    solution I was looking for...I was hoping to find a small chip, at the size
    that can fit inside a greeting card. The chips I know of can store short
    melodies. I want to find one that can hold a short song.

  12. Robert Baer

    Robert Baer Guest

    Short melody, short song, short noises; all the same.....
    Way back in the early 1980s, there was a program PC Parrott, that
    would record voice from the Casette input of the first IBM PCs made
    (newer ones dropped that feature); the program could als play back the
    recording to the speaker.
    For a one bit A-D (the Cassette input) and D-A (the speaker), the
    quality was rather decent, especially for voice.
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