Alesis QS6.1 QS7.1 QS8.1 Synthesizer Mix Chart Reference Sheets, Reproduction.
Alesis QS6.1 QS7.1 QS8.1 Synthesizer Keyboard "Mix Chart" Quick Lookup Reference Sheet, Reproduction. These are quick reference info sheets for the Alesis QS6.1, QS7.1, QS8.1 models of synthesizer keyboards.