I like the design but no, I will not buy one.
If the Abes want to crack into the lucrative clothing market, they have to break from the boring logo that everyone (here) has seen and branch out into some general graphics more people can relate to, like dancing.
And voila, "Ableton" is now a clothing manufacturer.
And $34 is a bit overpriced for usd at the moment so I'm guessing they won't sell very well over here.
So, what I would suggest is: keep going with the t-shirt designs, keep making them relatively generally related to music, but not overtly about their cryptic logo that only means something to a very slim target demographic who already gives them business. Charge about $20 except for holidays and when you have to dump inventory by taking 5 bucks off (or give a free one to ethios4 for 10 years of upgrades). Saturate the market with the Ableton name and treat it as your advertising budget.
And if the clothing business takes off, use the profits to hire another software dude whose job it is to make shit stable.
Again, nice design.