Alesis QS6.2 Synth

I recently fired up my old Alesis QS6.2 synth after a long hiatus, only to discover the user bank was hosed. Not only did I want those sounds to play with, but they have special significance to me, since I worked on them while I was at Alesis!

Opening up the unit, I found out sure enough that the battery was dead. It was pretty easy to find a source online, so I ordered a replacement and soldered it to the motherboard. No big deal.

I figured it would then be easy to find the QS6.2 User Bank sysex file online. But to my surprise, the Alesis website didn’t have it. Apparently, it underwent a major overhaul and this old file didn’t make it through the migration. UPDATE: I found a page for legacy Alesis products here!  You can find the downloads for almost all old Alesis products there.

But, searching through my old computer files, I found it on my computer from when I worked on it!

So, as a public service to all of you QS6/6.1/6.2 fans out there, here is the original factory QS6.2 User Bank sysex file.

To load this into your QS synth, you’ll need a MIDI interface for your computer and some MIDI software. On Windows, I use Cakewalk or MIDI-OX (free).  Enjoy!!

Leave me a comment below if you have a QS synth! – Brian

p.s., this is the NAMM show display where we introduced the QS6.2 synth back in 2002. I was in charge of the update from the QS6.1 to QS6.2. I upgraded the D/A converters, improved the analog layout to eliminate hum in the outputs, improved the button layout ergonomics, and updated the colors (from black to silver).

Alesis QS6.2 at NAMM 2002
Alesis QS6.2 at NAMM 2002


  1. After replacing a dead battery and reloading SysEx files(thanks for this) onto keyboard, am having a challenge setting up Effects Configurations 3 & 5, LEZLIE+REVERB and OVERDRIVE+LEZLIE, and am finding the user’s manual challenging, leading to my question: How is, for example, SEND1 set up (Configuration 3) through LEZLIE, DelSND/PCH, DELAY1, RvbIN1/IN2, REVERB? Once I set the configuration, I’m having a challenge routing the effect. Maybe I should read the manual more. Thanks,

  2. Just dug my 6.2 outta moth balls to find battery dead and user bank fried. This helps greatly!! Thanks, Reno

  3. Man, THIS is public service. Thank you very much!

    And I must say I got negatively impressed with Alesis’ site. In the Legacy list I just couldn’t find the Quadrasynth. Does Alesis regret it? I think my QS6.2 is a very nice synth. Good job! : )

  4. Brian, Just bought a QS6 on ebay, no display (screen glows green but no data display) also no sound output. Just wondering…even if I reinitialize the synth still makes no sound. Does this have anything to do with having no visible data on the screen enabling me to navigate to a patch? BTW I ordered a new screen on the way, just hoping it’s not the motherboard. Visibly everything looks ok on the motherboard. Components warm up as they should…….any insight would be appreciated! Thanks,


      • Thanks for the insight, Brian! I guess I have one more question..lets say theoretically the synth is working normally, if you were to re-initialize to factory settings by pressing 0 and 3 simultaneously while powering up, would you be able to play a sound right afterwards, or would you have to scroll thru the menu and choose a patch in order to make a sound? (With a blank screen and no display, I’m wondering if a sequence of commands are needed to produce a sound from a mix or a program first…)

  5. Brian: thank you for the post / SysEx file – a lifesaver! I am basic MIDI conversant (with note values, CC’s, etc.), but not SysEx saves and loads. Could you note the brief principles of how to send the SysEx file to the synth using something like MIDI-OX (and anything I need do on the synth to set it up to receive)? Many thanks…


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