Mix quality can be assessed in two ways:
technical quality and
perceived quality.
Technical Quality— This refers to the format and resolution of the audio:
- Lossy — compressed formats (e.g. MP3/AAC, 44.1kHz/16-bit, up to 320 kbps).
- Lossless (Hi-Fi) — uncompressed CD-quality audio (44.1kHz, 16-bit, WAV).
- Hi-Res (Hi-End) — high-resolution audio (48kHz/24-bit and above, WAV/AIFF, FLAC/ALAC).
Perceived Quality— How the audio actually
sounds:
- Dynamic range — contrast between quiet and loud parts.
- Frequency balance — lows, mids, and highs (frequency response of the mix).
- Depth & space — use of reverb, delay, EQ to create a sense of dimension.
- Stereo image — left-right placement of instruments.
⚠️ A track may be high-resolution but sound flat, muddy, or lifeless. Conversely, a technically limited file (e.g. MP3) might still sound great musically—but will lack fine detail compared to a lossless or Hi-Res version.
The best references combine both high technical and high perceived quality—usually commercial releases by globally known artists.