Triode User
Member of the Trade: WAVE High Fidelity
If I got that right, you're saying that the M-Scaler treats 48K signals as video. Then the M-Scaler reacts to that as video. Not sure what that means exactly. However my DAB radio runs at 48K.
With the first coloured ball on the left you can select whether Video Mode is On, Off or Automatic. If you have it on Automatic the Mscaler will automatically turn on Video mode (reduced tap length) when it detects a 48k signal. That is why I keep this turned to Off. I do run my DAB radio through the Mscaler and this together with my 48k music files is why I keep Video Mode 'Off' rather than automatic.
Hope this helps.
See the extract from the manual below.