Hi Everyone.
I'm an extreme newbie here, so please be gentle:-)
I'm interested in making a twin audio generator for use in experimenting with hemisync.
Frequency range needs to be up to about 1kHz, with the ability to offset one output from the other by zero to about 20 Hertz, with as fine an adjustability as is possible.
I understand the basic premise of generating audio with a DAC, but the coding is going to be slow going, it being pretty different from my experience with Fortran in the 1970's.
Anybody interested in flexing their wings on this one?
To generate very pure, accurate low frequency sine waves, Direct Digital Synthesis should be satisfactory. There is plenty of material on the web about tone generation, but this might help you get started with DDS: http://interface.khm.de/index.php/lab/experiments/arduino-dds-sinewave-generator/
The source code listing reminds me of the COBOL I tried, and failed, to make sense out of in the 1970s.
Maybe it is time to look into Stamp Basic.
Thank you for the response.
Search "piano tones micros", adjust the piano frequencies I used. Should be pretty straightforward.