I have a programming request. I’d like to have the ability to generate slightly different tones in the left and right channels.
It is possible to do this manually, by having a full-left mono track, and a full-right mono track, and use the tone generate tool to, for example, set the left channel to 440 Hz, and the right channel to 428 Hz.
If it’s possible, I’d like to have a slider, which allows me to adjust the pitch of the generated tone down-and-up about -/+ 10%, (say -/+ 40 Hz, when centered around 440), in real-time. Yes, in real-time. (Sine wave is fine).
Why in the world would someone want to do this?
Psychoacoustics: one symptom of sudden sensorineural hearing loss (SSNHL, a real thing!) is for a person to hear a slightly different pitch in the left ear vs the right ear, even when both ears are “fed” the same pitch in Hz.
Having a tool to “slide” adjust the pitch of a track in real-time in Audacity would be very helpful – e.g., setting the left ear to a reference pitch (e.g., 440), and using the pitch slider for the track for the right ear, to adjust the pitch to allow a subjective matching of frequencies.
Note that this is a psychoacoustic matter – a subjective call, when the two pitches sound in tune (when, in fact, one channel has been adjusted to match the other, so they sound like the same frequency).
This is a concrete example of a reason for this tool – a gizmo in Audacity that would be useful for diagnostics in hearing.
I imagine such a tool would also be helpful for micro-tuning two separately recorded tracks, on the fly, so to speak – without having to resort to the effect “change pitch …” and adjusting whole tracks by trial and error.
I envision a tool that might show up in the left side of each track, under the “- … +” volume slider and “L … R” channel slider. This would be a big change in the layout, possibly, so a stand-alone tool might be more appropriate, and more easy to create, of course.
Is such a tool possible? For the acoustic test, it would be very handy to able to set both left and right channels through the standard audio test frequencies of (Hz) 125, 250, 500, 1000, 2000, 4000, and 8000; but also, for musicians, to choose to compare to multiples of standard octaves, say 110, 220, 440, 880, 1760, etc … up to as high as 16000 Hz or so.
This tool might also make it possible to measure individually perceived “octave stretches” – i.e., most people will hear 1760 as slightly flat relative to an octave lower at 880. Piano tuners call the need for making this adjustment “stretch”, and good tuners will purposefully tune 1% to 2% higher with each increasing octave (1% to 2% lower, with decreasing octaves).
Anyway, this is a serious request. Anyone out there have the skillset to develop a tool which allows micro-frequency adjustment of a single channel in real time?
Thanks much. Gotta say, Audacity is the best.
(If there’s a better forum for this request, please let me know, or feel free to move this request there. Thanks.)