Sonic Blaster
The Sonic Blaster is a full-featured stereo digitizer, that records, amplifies and plays back in rich, full stereo.
Sonic Blaster - cables
Sonic Blaster - screenshot
Manuals & files
Opens on ae.applearchives.com (not rehosted here).
Source page: https://ae.applearchives.com/apple_iigs/sonic_blaster/