Sony Yeds-18 Test Disc May 2026

| Track | Signal / Content | Purpose | |-------|------------------|---------| | 1 | 1 kHz sine wave, 0 dB (full scale) | Check output level, distortion, channel balance | | 2 | 1 kHz sine wave, –20 dB | Linearity test | | 3 | 1 kHz sine wave, –60 dB | Low-level linearity, noise floor | | 4 | 100 Hz sine wave | Low-frequency response | | 5 | 10 kHz sine wave | High-frequency response | | 6 | 1 kHz square wave | Transient response, ringing | | 7 | 20 Hz–20 kHz sweep | Frequency response check | | 8 | EIAJ test signal (multi-tone) | Intermodulation distortion, digital filter behavior | | 9 | Track jump / defect simulation | Servo adjustment, error correction strength | | 10 | Reference music (e.g., “Take Five” – Paul Desmond) | Subjective listening evaluation | | 11 | Black burst (digital zero) | D/A converter zero-crossing performance | | 12 | Spindle motor speed test | CLV servo adjustment |