Possible HDMI solution for the SM?

[barfle]

Put a stereo preamp before the SM.

One problem with that is that tone controls affect the phases between the channels, especially at their crossover points, and that will change the locations of the sounds.

 

[ar surround]

One problem with that is that tone controls affect the phases between the channels, especially at their crossover points, and that will change the locations of the sounds.

If the 3dB bass boost that I use does change the locations of the sounds, I haven't noticed it. Perhaps it is because I only use the SM to enhance stereo material. I don't use it to decode QS or SQ.

 

[zdjh22]

Looks like the one(s)!

Very nice!

I couldn’t resist, and I’ve ordered a set. This will make a workable replacement for my aging Korg D888, and I wouldn’t mind trying my hand at figuring out pipewire to capture and route my SM output to HDMI.

 

[MidiMagic]

One problem with that is that tone controls affect the phases between the channels, especially at their crossover points, and that will change the locations of the sounds.

Unless the tone controls are independently set for each channel (or badly designed), they should have identical phase effects on both channels. This should not affect either SQ or QS.

My tone controls have almost always been before the matrix decoder.

 

[bob.stek]

One problem with that is that tone controls affect the phases between the channels, especially at their crossover points, and that will change the locations of the sounds.

My Apt has a toggle to defeat the tone controls as well as a continuously variable stereo mode control that swings from pure L+R to pure L-R as well as a center detent for regualr stereo.

 

[barfle]

Unless the tone controls are independently set for each channel (or badly designed), they should have identical phase effects on both channels. This should not affect either SQ or QS.

My tone controls have almost always been before the matrix decoder.

That would be true if both channels had the same program material. But then it would be mono. An instrument with overtones (and they all have them) placed off-center (not mono) could end up with interesting but unintended placement. And EQ before decoding won’t compensate for the different acoustic environment of each speaker.

Not saying you have a bad setup. If it suits you, then it’s right. But there can be issues.