View Full Version : Voice Storage problem

04-13-2006, 08:53 PM
I want to play 8 min song. I want to store it in non-volatile memory. I do know about APR6016 but it samples with rate 8KHz only (I am looking for better quality). Dataflash (Atmel) or memories in MB are not available in mumbai (At least in loose). So I am looking for better option for APR6016.
Can any body tell me abt mobile memory card protocol. Becoz it will b chipest memory and easily available upto 256MB also. Is it possible to interface it with uc.

04-13-2006, 10:56 PM
Sampling rate of 8khz is sufficient in most cases. Cost of the obsolete APR6016 is about 450/- to 600/- This has a built in "Funny Flash " memory.
OIther chips are available as voice chip/ Ext memory. Try Winbond. Aplus is a dead company. http://www.winbond-usa.com/mambo/content/view/55/159/
Mobile Recorders are 8khz samplling rate. The higher sampling rates are very expensive.

:arrow: This post is in the wrong section. vikas/rao please shift this to the correct section.
The Forum is 3000 strong and growing stronger. It is time to impose some post discipline among the members.

04-14-2006, 10:47 AM
MMC cards have MMC bus and SPI bus interface options. Many new uCs have hardware support for SPI bus.

Read this datasheet for the protocol:

:!: Tip: Buy a second hand 34/64 mb card from a local shop, they are dirt cheap since many phones ship with these cards but the buyers exchange them for a bigger ones.

If you need more memory, use a bank of these cards with individual chip select signal. works out cheaper.

I bought a 32 Mb card for 40 bcuks. compare that with the 85 bucks I paid for a 64KB EEPROM chip. 8)

11-16-2007, 11:22 PM
SEE HERE http://www.flickr.com/photos/20945061@N02/2037537725/
TPS Online

11-17-2007, 09:50 PM
check out www.butterflymp3.sourceforge.net/
They make something similar with MMC card, a AVR development board + Nokia LCD.
AVR development board costs around 20$ or you can make one yourself. I guess its open-source from atmel. Somebody gave you the cost of MMC cards. Nokia 3310 LCD's will also cost between 70-100/-. Color LCD's can be little higher.

Instead of mp3, you can use the good old wav files. They store PCM data and can be directly outputed to DAC.
check out http://ccrma.stanford.edu/CCRMA/Courses/422/projects/WaveFormat/