When you use the "Key Lock" (Master Tempo) feature in OtsAV 1.90, the software applies phase vocoding only to the sides, leaving the center punch intact. The result is that a +8% tempo shift doesn't turn your kick drum into a mushy thud. Many veteran mobile DJs refuse to upgrade because they claim modern software introduces "digital ear fatigue," whereas OtsAV 1.90 sounds analog and warm.
Today, OtsAV 1.90 is remembered as the version that solidified the software’s niche: the king. It became the go-to choice for: Radio Stations : Who needed 24/7 automated reliability. OtsAV DJ Pro 1.90
Great for radio shows, background music with occasional DJ drops. When you use the "Key Lock" (Master Tempo)