Having a verified BPM in advance is an import part of timing since you can often do the math in your head while loading a track and know that if you want to get from 120 to 128 that's about a 6% difference. If you're already up 2.5% then you know you need to make up 3.5% before you even start to cue. That's a time saver and very good information to have when you are breaking new music.
Dramatic changes in pitch will seriously alter the key, and extreme key correction or time stretching creates audible distortions in the track, not to mention most people are familiar with what a given song is supposed to sound like. So even if you can increase it's tempo by 12% it's not likely to be well received that way.. you'd have to have a plan to return it to normal range while masking the wow.
Software doesn't have any of that instinct and at best it simply aligns beats, ignores key, and times out a cross fade without any deference to lyrical content or measure.
Dramatic changes in pitch will seriously alter the key, and extreme key correction or time stretching creates audible distortions in the track, not to mention most people are familiar with what a given song is supposed to sound like. So even if you can increase it's tempo by 12% it's not likely to be well received that way.. you'd have to have a plan to return it to normal range while masking the wow.
Software doesn't have any of that instinct and at best it simply aligns beats, ignores key, and times out a cross fade without any deference to lyrical content or measure.