Thanks,

I should have been clearer.

The backing track is recorded on Track 1, which is set to be mono-audio

We then set empty track 2 to also be mono-audio, and track 2 is highlighted/selected.

We click the record button, the metronome count in starts and we are recording to track 2 but we cannot hear the previously recorded backing track that is on Track 1.

So, no we are not trying to record over the top of the previously recorded track.

This running under Windows XP Pro, the "Sound Card" is what is built into the MSI mother board. It is an MSI K8MM-ILSR Motherboard with VIA/Realtek ALC655 sound chip.

So I'm thinking that might be the limiting factor and that the sound card may not support playback while recording. Just for grins I'm trying to install/update the sound driver again just in case. As expected updating the driver did NOT correct the problem.

The MB specs say that it is an AC'97 link controller integrated in VIA VT8237, 6 channels software audio codec ALC655, Compliance with AC97 v2.3 Spec and Meets PC2001 audio performance requirement.

As mentioned before, I normally use MIDI sequences for my own backing "tracks" and set an unused track in RB to audio, and record the output from our mixer/pa which includes the MIDI synth audio output, my guitar, and our vocals. That of course works just fine since the sound card does not need to play anything back at that point.

Note there is no problem with the sound card playing back if we have recorded a track in RB and then play it back, or any other playback functions with the sound card.

It is only when there is a previously recorded audio track that is loaded into RB (say as track 1) and we attempt to record to another track (in this example track 2) and want to have Track 1 playing while we are recording to Track 2.