Heartbeat BPM and Pitch Detector Issues

General TouchDesigner Discussion
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1

Hi all. I’m not 100% green to TD but I’ve never dealt with data/audio processing in the capacity that I’m currently seeking to.

Generally, I’m seeking to create a program for a performance piece that detects heartrate BPM and Pitch, and (with as little latency as I can pull off) output that back through Ableton as Universal BPM, and MIDI. I have already soldered up a stethoscope mic to get the audio, but naturally it’s the software side of things that’s providing issues.

I have attached my heartrate BPM .toe file here as it is my first snag in the project. The issue is that I cannot figure out is how to eliminate one of the two beats of the heartbeat, as them both together is affecting the BPM (the audio file is ~92, but my output is reading ~152.

I would appreciate any help in mentally figuring out this project from anyone who has done anything similar before, and I thank you for any help you may have both on the large and small scale!

bpm detector.4.toe (42.3 KB)

2

Could you include the heartbeat audio asset so we can see the data?

3

Heartbeat_ZA02.337.mp3.zip (994.1 KB)
Sorry about that, it’s attached!

4

A thought, instead of using a mic, use a fingertip ecg sensor. It gives you a voltage and it’s much easier to set a threshold for a trigger.

If you want the sound, sample it and play it back using the ecg data as the trigger.
Only you will know.