Stereo sound support

[nesbox]

Add flags to the RAM to mute left/right stereo channels

[nesbox]

done here db36920

[The-Beesh-Spweesh]

Is this global, or can you configure it for each channel individually?

[nesbox]

each channel individually, using peek/poke or assisting in the Instruments (Sfx editor)

[The-Beesh-Spweesh]

Also, why can't you input effects to the music editor yet?