Comments on: Arduino Sound – Part 1

By: biojae

biojae — Sat, 05 Apr 2008 22:53:13 +0000

What about a hybrid solution?
like PWM to a 4-6 bit dac?
Source: http://www.k9spud.com/traxmod/pwmdac.php

pwm0 -----[10k]----.
pwm1 -----[220]---.|
pwm2 -----[120]--.||
pwm3 -----[50]--.|||
                ||||
                ++++---(spkr)-|
                             ---
                              -

By: DrLucas

DrLucas — Fri, 04 Apr 2008 02:39:54 +0000

Hey all, i was wondering if anyone has used an arduino to play piano key notes(the whole piano) and if so how did you do it? If not, did you make something else that could be rigged the same way, fyi, looking for a low cost solution.

I have an old piano that is non-electric and want to rig it to play electrical notes when a key is pressed. I want each key to complete a circuit when pressed and then the arduino send a signal to a speaker to play the sound, or send a signal to something else i might need to then send the sound… i read most of the things in this and have not really seen anything that i thought would work the way i needed, but then again, some stuff i just did not understand

Thanks in Advance,
Daniel
DrLucas17@yahoo.com

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By: dfowler

dfowler — Wed, 12 Mar 2008 06:43:56 +0000

Hui,

That sounds like a great idea. You could scrounge a connector from an old MB. It should be fairly easy to interface to the old ISA standard. I wonder how many old sound blaster cards could be recycled into MIDI synths using an AVR to work the magic between the MIDI and the ISA bus…

By: Hui Hai

Hui Hai — Wed, 12 Mar 2008 01:20:58 +0000

I’m thinking about use old ISA soundblaster awe32 to generate sounds. It has goor wavetable synthesizer mpu8000 that can generate 32 channels. AVR(orPIC) controls the ISA bus. Gravis card is better documented but hard to find?

By: manibabu

manibabu — Mon, 25 Feb 2008 12:06:39 +0000

i realy like the project u r submitted….one important think is ur software details r not enought to create complete project…so i want more information on creating different sound wave using PIC16F785 with the help of inbuild PWM.
thanks…

By: dfowler

dfowler — Mon, 31 Dec 2007 07:35:30 +0000

Mike,

I loaded up your code, it sounds great! Very hypotonic.

I modified the code so that it plays continuously with a phase increment control. This way I can effectively resample the waveform like a DDS does to control output frequency.

Your sound does not loop well; I did adjust the length to get a better loop sound. It would be neat to use the Futurama Hypno-Toad sound for this. Maybe make the sound vary based on some input like light level.

I will send the code if your interested.

By: Mike

Mike — Sun, 30 Dec 2007 21:16:18 +0000

Hey, I had some luck with the hardware PWM trick you talked about.

http://www.arduino.cc/playground/Code/PCMAudio

By: Gian Pablo

Gian Pablo — Wed, 21 Nov 2007 19:26:52 +0000

I’ve been using a hybrid approach, using serially controlled digital potentiometers and voltage-controlled oscillators.

It gives me 6 quite good-sounding voices, with very little processor load.

I’m planning to package up the hardware as an Arduino shield, or as a dedicated Arduino-compatible audio package.

More info here: http://itp.nyu.edu/~gpv206/2007_fall/arduino_audio/

By: Craig

Craig — Wed, 14 Nov 2007 19:37:37 +0000

What about the WinBond ChipCorder? Used them in a talking appliance project, and they worked quite well. Not really a solution for generating sound, but you can record onto them and playback, all controlled by I2C or SPI protocols. Pretty much plug and play, even has features to manage the memory addresses of your messages. Seems to have been designed for telephone answering machines.

http://www.winbond-usa.com/en/content/view/36/140/