I'm experimenting with primary samplers for the first time and am encountering short DC offsets that make popping sounds when retriggering a sample in progress.
I've made the circuit as simple as possible. It's just a sample player triggered by a pushbutton:
I made a sound file where I retrigger it several times before the sample has completed (it's a long, sustained sample of a trumpet tone). I'm not allowed to upload the sound file, but here's a picture of it:
Here's a close-up of the first trigger. It sounds perfect:
And here's one of the retriggers. I've circled what looks like a short DC offset that begins at the start of the trigger. It pops.
Am I missing something here? I expected that during a retrigger the output signal would immediately drop to zero and the sample would restart from the beginning. But that's not happening. The sample is indeed restarting from the beginning, but not from zero.
I'm confused by what I'm seeing and hearing, and don't know how to proceed. I feel stupid because builders have been using these samplers for decades. Any ideas?