Bug: adc~ 1 not working correctly with ES-8 (only in PlugData Universal)

[davidwalls76]

I'm using an Expert Sleepers ES-8 audio interface on macOS and found a bug in PlugData related to input channel 1.

In PlugData (Universal version), the [adc~ 1] object doesn't work properly — the signal is choppy or not coming through reliably.

In Pure Data (vanilla), it works perfectly with the same hardware and settings.

I tested multiple inputs and confirmed the issue is only with channel 1; channels 2 and up (adc~ 2, adc~ 3, etc.) work fine.

As a workaround, I created an Aggregate Device combining the MacBook's internal mic and the ES-8. This shifts the ES-8’s first physical input to [adc~ 2], and in that case, the signal works perfectly.

This strongly suggests a bug in how PlugData handles input channel 1 specifically. System details:

macOS Sequoia 15.1

MacBook Air with M2 chip

PlugData Universal (latest version from the official website)

Audio interface: Expert Sleepers ES-8

Audio engine: CoreAudio (using an Aggregate Device as a workaround)

Thanks a lot for your amazing work on PlugData — it's an incredible tool!