At this point, there isn't a single song I've worked on over the past year or two that Jack hasn't touched in some way. As someone who records and mixes music myself, I'm probably much more picky about who I can trust will deliver great results from what I send them. In the few cases where there is a miscommunication between the artist's vision, and Jack's interpretation of how the mix should sound, he is quick to make adjustments to satisfy the client, and will continue tweaking until you are more than satisfied.

I worked with Jack on my last record and I can say he is awesome to work with! He deliver fast mixes that always sound amazing, and he is super open for feedbacks and he will always make sure to make the client happy with the final result. Great price for the final product! His master are also insanely good! He is able to really enhance the mix that was already great!

Also, he has the most important thing as a producer/engineer, he has great taste on his choices! Therefore, I really believe you should consider him to mix/master your record! He is kindly enough to do a free mix/master test!

MINISTER OF PAIN: I have worked with Jack for past (2) years. With regard to mastering; Jack Kosto clearly has a solid technical foundation. But the value that sets him apart from others, is his ability to understand the vibe that the artist ultimately desires. He then uses his technical knowledge to execute and delivers a high quality finish every time. For all of the effort that goes into a production, I won't put mastering into anyone else's hands. No others. No way! I would recommend Jack for any genre. You won't be disappointed. JB

MINISTER OF PAIN: I have worked with Jack for past (2) years. With regard to mastering; Jack Kosto clearly has a solid technical foundation. But the value that sets him apart from others, is his ability to understand the vibe that the artist ultimately desires. He then uses his technical knowledge to execute and delivers a high quality finish every time. For all of the effort that goes into a production, I won't put mastering into anyone else's hands. No others. No way! I would recommend Jack for any genre. You won't be disappointed. JB

I can't say enough when it comes to Jack. Absolutely brilliant player, writer and engineer.He truly has a relentless passion for what he does. I have the distinct honor of being involved with Jack in a musical endeavor where he co-writes, handles the guitars and also does the mixing and mastering and I must say... His work ethic and professionalism are unmatched, and he is an absolute genius with sound. I simply cannot recommend him enough.

By far the BEST person to have Mix/Master your album. I've worked with Jack on multiple records and multiple sessions and he is easily the only guy I will call to mix/master my records. VERY affordable and will work until you are 100% satisfied. Also always meets the deadline.

Jack has an incredible skill set and continually strives for greatness in his work. I greatly appreciate his work and the professional mindset he brings to the table. Highly recommend!