Driving 10 sound exciters with Arduino

[R_Gol]

Hi there,
I'm working on a project and I would like to use arduino in order to generate 8 sinusoidal wave at different frequency, each with its own envelope to control is amplitude and another two pink noise as well with their own envelope to control the amplitude.

What are my option for making the above with arduino?
Can I generate sinusoidal wave using an arduino? If so, how many independent waves I can generate from one Arduino Uno?
Do I need to connect an audio amplifier between the Arduino to each of the sound exciters? If so, a simple LM386 will do the job for that?

Thanks for any help

[DVDdoug]

The regular Arduino doesn't have a true-analog output. analogWrite() is PWM which can simulate/approximate analog in some applications.

There is a library called TMRpcm for audio but it's limited and there can be issues since it's not true-analog. And it doesn't support 8 or 10 channels.

There are audio shields (add-on boards) that do have DACs and they can play audio files (WAV or MP3, etc.). Of course most of these are 2-channel stereo but you can probably control multiple audio boards with one Arduino.

If so, a simple LM386 will do the job for that?

Yes, but you'll have to try it to see if you get the quality & loudness you need. For testing you can generate tones & noise with Audacity and connect the LM386 to your computer.

[Paul_B]

@R_Gol

I'm working on a project and I would like to use arduino in order to generate 8 sinusoidal wave at different frequency, each with its own envelope to control is amplitude and another two pink noise as well with their own envelope to control the amplitude.

So you need hardware to do that.

I can't really see what an Arduino UNO has to do with such a project.

[TomGeorge]

Hi, @R_Gol
Look at this Arduino site;
https://create.arduino.cc/projecthub/projects/tags/synthesizer
It sounds like you are making a basic sound syth.

These will show you how getting your 10ch unit be extremely difficult if not impossible.

If you Google;

arduino audio synthesizer

This may help.

As hinted above, you could get the arduino to be a system controller, but have to have individual modules for each channel.

Tom...