Ψ-W2-T2: collapse a capture whose channels are bit-identical to one lossless mono channel, index value measured off the landed file

src/core/model/bank_model.h

@@ -88,6 +88,9 @@ struct Sample {
 
     double wetDry = 1.0;            // 1.0 = fully wet, 0.0 = fully dry
 
+    // Channels in the file this entry names — equal to its `fmt ` count by
+    // construction, which is what makes the instrument's mono/stereo read-out and
+    // its waveform lane count agree with the audio. 0 = unknown (pre-field entry).
     int    channelCount = 0;
     int    sampleRate   = 0;