Anyone have 'stereo blend' control experience?


I'm interested in any details anyone may be able to provide concerning 'stereo blend' controls, for progressivly reducing a 2-channel signal down from full separation towards a mono blend, presumably through cross-mixing.

What older equipment might you be familiar with that featured such a contol? Did any incorporate a 'defeat' provision, or was the control always in the circuit? If you ever used one, how well do you remember it working?

Do you have any electrical design knowledge of previous implementations of this idea, or suggestions on how to make one? What kinds of parts were used in any older designs you may have seen? Do you know of any schematics?

I realize this probably was a pretty obscure feature even in its day, but maybe some of you more, ahem, experienced hands out there know what it is I'm talking about. TIA for any info!
zaikesman

Showing 2 responses by zaikesman

Thanks for the tips so far. This request is for playback of material such as Viridian mentions - early stereo recordings which suffer from hard left/right panning techniques. Although mono-ing the signal can work, it often results in some frequency cancellation, and preserving a part of the stereo effect would be nice to achieve. Bob P. is correct about the severity of the situation when using headphones especially. It's interesting the Dyna stuff seems to have featured fixed postition switching instead of continuous variability. The tuner version of this idea that Bob B. mentions is supposed to not change the stereo soundstage, and so wouldn't be what I am after here, but it might have something to do with the impetus for the Dyna control, if it dates from the era of the advent of FM stereo.
Correct, Bob B., and I'm pretty sure some older preamps or receivers featured such a control, like the Dyna's and AR mentioned. Onhwy61, I'm not looking to digitize anything for this, just to get somewhere in between full stereo and full mono when listening to 60's recordings with unatural panning extremes. Any more citings of gear that had this feature would be great.