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Major Innovator Passes

Keith Barr, who invented and designed several key products in the history of the recording and music industry passed away at the age of 61. Barr was one of the founders of the original MXR company, and designed the original Distortion+ pedal, among other products the company made. He then went on to found Alesis, where he and his engineering team developed the XT reverb, the MMT8 sequencer and HR-16 drum machine, and the paradigm-changing ADAT. Later products included the Quadrasynth series of synthesizers, the X2 recording console, the DM5 drum module, and the Andromeda A6 analog synth. One of the strengths of Barr’s innovations stemmed from his insistence on creating his own IC chips rather than using off-the-shelf chips. In fact, a separate division of the company called “Alesis Semiconductor” was formed to produce and markete chips for the audio industry. After selling Alesis in 2001, Barr went on to pursue other scientific and technical interests, both in and out of the music industry.

The list of products — which were intended to provide professional performance at new, affordable price points — launched by Barr and his team revolutionized the recording and music industries in many ways, and were a major factor in the blossoming of the project and home studio worlds.

Never comfortable in the spotlight, Barr preferred to remain behind the scenes and under the radar, resulting in his being one of the great unsung innovators in our industry. Our condolences to his family and friends.

Offer applies only to single-receipt qualifying purchases. Select manufacturers may require that only the manufacturer’s products qualify towards the minimum purchase amount needed to be eligible for promotional financing. Otherwise, an invoice that meets the minimum purchase amount and contains at least one qualifying manufacturer product is eligible for promotional financing. No interest will be charged on promo purchase balance, and equal monthly payments are required on promo purchase until it is paid in full. The payments equal the amount financed divided by the number of months in the promo period, rounded up to the next whole dollar. These payments may be higher than the payments that would be required if this purchase was a non-promo purchase. During the last month(s) of the promo period the required monthly payment may be reduced due to the prior months’ rounding. Regular account terms apply to non-promo purchases. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

Offer applies only to single-receipt qualifying purchases. No interest will be charged on the promo balance if you pay it off, in full, within the promo period. If you do not, interest will be charged on the promo balance from the purchase date. The required minimum monthly payments may or may not pay off the promo balance before the end of the promo period, depending on purchase amount, promo length and payment allocation. Regular account terms apply to non-promo purchases and, after promo period ends, to the promo balance. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

The estimated required monthly payment shown which excludes taxes and delivery equals the amount financed divided by the number of months in the promo period, rounded up to the next cent. During the last month(s) of the promo period the required monthly payment may be reduced due to this rounding. These payments apply only with the financing offer shown. If you make these payments by the due date each month, you should pay off this amount financed within the promo period, if it is the only balance you are paying off. If you have other balances on your account, this payment will be added to any other minimum monthly payments.

Applies only to select items from this manufacturer. Ask your Sweetwater Sales Engineer for more details.