The process of converting from mp3 to WAV is slow, and the most likely reason is that the sampling rate in Studio One is inconsistent with the sampling rate of mp3. I used to use a sampling rate of 48000Hz for all songs in Studio One, but almost all the mp3s I use are 44100Hz, and the SRC process will be very slow. After testing, if the two sampling rates are the same, the conversion speed is fast enough.