Toyokasei Japan 黑胶唱片和CD

Notes: An analogue LP containing numerous reference sound sources for correcting and adjusting turntables, DJ mixers, and sound systems!

Side A includes:

1. Left/right balance (1:35) First, check the left/right balance. Since the click sound is recorded on the left and right sides with the same volume, please adjust the level knob of the playback device so that the click sound can be heard from the centre when listening from the front. Then confirm with another click.

2. Phase response (1:32) Checks the phase for correct polarity in stereo equipment. When the phase is normal, the white noise sound is heard from the centre, and when the phase is reversed, it is heard separately outside the speaker.

3. 1kHz (0:35) This is the reference tone of 1kHz. This sound is said to be the reference level of the playback equipment. It is used for checking the output voltage and S/N ratio.

4. Crosstalk (1:10) Check left/right crosstalk on playback equipment. A 440 Hz A sound (radio time signal sound) is initially played on the left channel for 15 seconds. Check how much this sound leaks into the light channel. The less sound leaks, the better the crosstalk. Then run it for 15 seconds on the light channel as well. Check how much it leaks into the left channel.

5. Irregular rotation (2:23) To check the "irregular rotation" of the turntable, run a 3kHz sound for 120 seconds. A turntable with little "rotational unevenness" allows you to hear sound at a constant pitch. When there is a lot of unevenness, it sounds unstable.

6. Standing Waves (1:43) Check out the standing waves in the listening room. Since it varies continuously from 20Hz to 1kHz, it can be said that there are few standing waves if the volume is uniform.

7. Non-recording groove (0:45) This is a non-recording groove for checking the noise-to-signal level ratio of the entire device. You can also use it to check for turntable rumble or hum.

8. Frequency response (1:53) High range frequency response (15kHz, 10kHz, 9kHz, 8kHz, 7kHz, 6kHz, 5kHz, 4kHz, 3kHz, 2kHz, 1kHz). Low range frequency response (1:33 1kHz, 800Hz, 500Hz, 400Hz , 300Hz, 200Hz, 100Hz, 70Hz, 50Hz).

9. Special appendix: sound effects 1. Table tennis (1:00) 2. Helicopter (0:30) 3. Racing car (0:30) 4. Steam locomotive (0: 30) 5. Truck (0:30).

Side B includes two Japanese Jazz standards as well as other recordings to test your settings.