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nathanRamaNoodles / Noodle-Synth

A User-friendly Arduino/Teensy Library to play RTTL/MIDI with infinite polyphonic notes; it has full control over volume, pitch, and music. No shields needed(Just a speaker).
https://create.arduino.cc/projecthub/nathan_ramanathan/play-music-without-delay-40e51b
MIT License
139 stars 14 forks source link

Odd noise during/after notes #22

Open jfbauer432 opened 3 years ago

jfbauer432 commented 3 years ago

I gave this a try but I am getting some odd noises. Seems to be some combination of a hum and a swishing sound. Seems to happen with/after the notes. Here is a sample of what I am getting

:o=4,b=115:4e,2e,2p,4e,2e,2p,4e,2e,2p Recording https://easyupload.io/76uxom

The issue is more obvious during the brief rests. If I add additional rests I can clearly hear nothing during that time as expected.

I am using the circuit from the README.md with a LM386 based amplifier (https://www.amazon.com/gp/product/B01FDD3FYQ) and an Arduino Uno.

nathanRamaNoodles commented 3 years ago

Try changing the frequency of the timer:

synthEngine mixer(20E3);

Instead of 20E3, use 30E3. If that doesn't work, try changing the octave level from o=4 to o=5

jfbauer432 commented 3 years ago

I was using v3.5.2, but that didn't appear to have the synthEngine stuff. I deleted the old library and installed the latest zip (4.0.0). Tried both synthEngine mixer(20E3) and synthEngine mixer(30E3) and I did not hear any difference.

Changing the octave made the notes sound different of course, but I still here that noise -- the pitch of the noise seems to have gone up as well. Also tried o=6 and it was still present.