Jeremy Nicoll <jn.ml.dbn...@letterboxes.org> writes: > On Thu, 17 Aug 2017, at 01:37, Rodolfo Medina wrote: > >> Thanks... But for my present needs, it seems that sox and audacity are >> sufficient: with sox I record tracks from multiple audio cards into >> different files; then with Audacity I merge those tracks into one final >> file, and have the possibility of adjusting at pleasure the balancing >> between left and right channel for each track and also adjust the relative >> volumes. In my litte basic experiments, I don't note any minimum effect due >> to time drifting or so, about which I read... > > You do realise that merging files, adjusting balance etc are all possible > with sox? > > One reason I do that sort of thing with sox is that by keeping note of the > commands I used to do each stage, I automatically document how I manipulated > a set of audio files. Documenting anything done via a GUI as in Audacity is > a great deal more difficult. > > It's worth documenting what you do so that if necessary you can exactly > repeat the process at a later date.
Thanks... In fact, what you suggest is exactly what I wanted to do but didn't manage to... In fact, suppose I have two files: piano.wav and voice.wav, created by sox in recording piano and voice respectively, simultaneously. piano.wav is a stereo file, with the two channels, left and right, inside it; whereas voice.wav is a monophonic file. When I put them together to create the final, say, result.wav, I must properly allign them. Now, Audacity makes this job easy thanks to the graphical possibility of seeing the waving forms and magnifying them. Instead, with sox, I tried to use the `delay' option with no success. Maybe can you suggest a better and proper way to do that...? One more thing: I remember, Jeremy, your suggestion of purchasing a multi-channel audio interface, to be preferred to a mixer, and will do in future. But do you think that the solution I'm adopting for now: different files on different single-channel audio cards and then merging them - dou you think this is a good solution as well...? What difference between this cheap one and more or less expensive multi channel interface...? Thanks, Rodolfo