This is probably the best SPC player of them all. It has a myriad of features: speed/pitch change, channel mute, echo disable, DSP pitch/volume registers, etc.
Use the left and right arrow keys to toggle the data viewed during SPC playback.
The bundled spcplay.ini enables Lucida Console font. To enlarge the UI, open spcplay.ini and set SCALE 0 : 200
v2.17.7 (build 5616) (2016/08/27) This updated version of spcplay fixes the pitch modulation amplitude (for example, FF6 Kefka's laugh).
Nothing of value was changed in this submission. The font is something everyone can easily change themselves by just editing the INI file, and that aside, I don't even necessarily agree that Lucida Console is a better font than the font already used as the default.