Do not convert to MP3. Convert to ALAC (Apple Lossless).
Anneke van Giersbergen’s voice in Take Me Away floats above crashing cymbals. In lossy formats, cymbals often degrade into a "swishing" noise due to psychoacoustic masking. FLAC reveals the metallic shimmer and the delicate bowing of the violins behind the vocal line. Globus - Epicon -FLAC-