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 [ 9 posts ] 
 Sound chips 
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Joined: Tue Dec 11, 2012 3:41 am
Posts: 68
Lately I started being couscous about sound chips, so I bought from ebay the SAA1099 and the YM3812, and I was hoping to connect them to a PIC MCU so that I can communicate to them via MIDI. The SID chip is a bit expensive, so I am ignoring it for now. I wonder what other sound chips exist, and how good are they.


Wed Feb 06, 2013 10:40 pm

Joined: Wed Jan 16, 2013 2:33 am
Posts: 165
Have you heard of the SAM2195 which was formerly Atmel? There is a sound sample on this site:

http://www.kickstarter.com/projects/243 ... sic-synthe

I looked around and the chips are available for 10 pieces in a lot:

http://www.aliexpress.com/store/product ... 13487.html

http://www.alldatasheet.com/datasheet-p ... M2195.html

Arrow.com use to sell it but I don't know if they currently have it available.

There are other chips and alternatives. I think I previously mentioned some of them on 6502.org


Fri Feb 08, 2013 12:39 am

Joined: Wed Jan 16, 2013 2:33 am
Posts: 165
I was looking through past mesages and someone recommended to go with an MP3 decoder to make music. I'm also asking around and I will probably go through old posts.


Fri Feb 08, 2013 2:24 am

Joined: Tue Dec 11, 2012 3:41 am
Posts: 68
I have a project that involves MIDI stuff and synthesizers, and that is why I ask. I don't know how to play any music, but I like the weird sounds. :D
For now I only built a mini MIDI synthesizer that is quite flexible, and I was hoping to use it for further developing other MIDI based devices.


Fri Feb 08, 2013 2:30 am

Joined: Wed Jan 16, 2013 2:33 am
Posts: 165
You might want to try the dsPIC33FJ128GP80 Pic from Microchip:

http://www.microchip.com/wwwproducts/De ... e=en532298

It is the chip in the Ronin 802 Synthesizer shield for the Arduino. Skip to 3 minutes and 2 seconds because the rest sounds like noise:

http://www.youtube.com/watch?v=L3VMu150 ... _embedded#!

I found it in this Hackaday article and there is tons of Midi and Music articles on Hackaday.

http://hackaday.com/2011/12/24/digital- ... -inclined/

If you want to use another microcontroller for sound, you can get chiptunes or another emulated chip like the Sid chip.


Fri Feb 08, 2013 3:02 am

Joined: Wed Jan 16, 2013 2:33 am
Posts: 165
Dajgoro wrote:
Lately I started being couscous about sound chips, so I bought from ebay the SAA1099 and the YM3812, and I was hoping to connect them to a PIC MCU so that I can communicate to them via MIDI. The SID chip is a bit expensive, so I am ignoring it for now. I wonder what other sound chips exist, and how good are they.


Have you tried the Yamaha YM2149 chip from ebay? They are available.


Fri Feb 08, 2013 3:13 am

Joined: Tue Dec 11, 2012 3:41 am
Posts: 68
I also met the Standuino guys by chance in real life, and they were toying with arduino stuff at the moment, and they showed me how such mcu synth sound and look like. I was hoping to bring together analog oscillators and effects to generate sound, and not digital synths, they sound a bit too squeaky to me. So I decided to build a big analog matrix(like a telephone central) that could patch any analog/digital sound source to any analog effect. The sound sources should be controlled via MIDI so they will require a digital interface. The sound chips would only be a part of it. I also got BBD chips for echo, 4007 chips for other various effects, and gotta build few VCOs.
I am going to use a 40 pin 18F PIC since I still happen to have them left when BitWise donated them to me. dsPIC33 is probably a expensive toy, and they are not easy to get, so I am avoiding them. I find the 16F and 18F capable enough to perform such tasks.


Fri Feb 08, 2013 7:11 pm

Joined: Wed Jan 16, 2013 2:33 am
Posts: 165
Dajgoro wrote:
I am going to use a 40 pin 18F PIC since I still happen to have them left when BitWise donated them to me. dsPIC33 is probably a expensive toy, and they are not easy to get, so I am avoiding them. I find the 16F and 18F capable enough to perform such tasks.


I'll let you in on a little secret. Microchip has free samples and I got free pics before but I recommend that no one abuses the system. They might have started charging for shipping. I just don't know if there are export restrictions or if you will have problems with customs.

They're basically five and a half dollars plus shipping. Google says it equals 4.11 Euros.


Fri Feb 08, 2013 8:58 pm

Joined: Tue Dec 11, 2012 3:41 am
Posts: 68
I might try getting some samples one day.
But another thing I noted is that they are 3.3V and mostly SMD, so that is a double ouch for homebrew prototyping.


Fri Feb 08, 2013 9:03 pm
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