Basically what I want to do is have a small box with speakers and a looping sound sample of bridge sounds from Star Trek as a background sound for a room.
Is there any form of solid state recording chip to store the sounds on or would I have to get a flash memory? I did have access to a digital sound recording chip but that didn't keep the sounds when the power vanished.
You could do it with a bootable CD, that would be built with a dos bootdisk & a dos mp3 player with the required sounds set to loop before burning it all to cd. (and of course the box would need to have it`s boot-order set to CD)
The ChipCorder devices are the standard solution to this:
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Sample rate ain't that high though, only designed for "voice" quality, although I notice they have one which goes up to 12KHz now, might be worth a try.
I had thought of that but what I want is a small box I can put in a bag or pocket and be fully portable and not have moving parts hence asking about a solid state chip
buy one of those tiny "keytag" sized personal MP3 players (preferably with a repeat function) and record sound effect to that. They typically have 128 MB or such of memory - and this would be non-volatile for certain ! These are available in many discount stores - electronics retailers and even supermarkets for very little cost.
128 MB would be sufficient for about 2 hours of recording at reasonable quality - so unless you needed it longer than this - a repeat function woulent be needed. if you dont need quality - then recording at 48kb or 96 kb would extend the play time significantly.
if longer duration is needed - and the player doesn't have a repeat function built in - then a timer (based on a 555 etc) could be used to trigger the "play" button on the unit - at the time the soundtrack reaches its "end" so as to repeat it.
--------------------- A small ampilifier and speaker are all else that would be needed, I feel that this setup would be able to be made quite small too.
Basically what I want to do is have a small box with speakers and a looping sound sample of bridge sounds from Star Trek as a background sound for a room.
Is there any form of solid state recording chip to store the sounds on or would I have to get a flash memory? I did have access to a digital sound recording chip but that didn't keep the sounds when the power vanished.
-- John
Life is short eat chocolate
Just source your material, whack it into your computer and enjoy composing a large wav file in a prog. like Cool edit (simple) there you can do much in terms of changing the sounds and looping etc.
Then convert the wav into an Mp3 and upload it to a simple (and now cheap) Mp3 player.
Atmel's DOC1456 application note describes using a ATmega8535 and a AT45DB161 16M bit DataFlash, plus some other circuitry, to do digital sound recording and playback.
The AT45DB161 are stock items available from Digikey for between US$5.70 and US$6.82, depending on the package.
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