Not all masters benefit significantly from shorter sides. However, it's the bass content in the music that takes up the physical space on the disc, so it's sometimes possible to have a longer side without compromising the level or audio quality. Our general guideline for maximum side length is 20 minutes for a 12" 33 rpm record and 14 minutes for a 12" 45 rpm record.
It's recommended to provide a vinyl premaster that already has low frequency level and stereo content that is suitable for vinyl production.Īs a general rule, the longer a side is, the quieter the record will be. The cutting system is equipped to correct minor issues with the bass however, more severe problems will result in a record that can't be cut or that sounds very different from the source audio files provided. Excessive stereo information in the bass appears as vertical movement in the groove, so it's sometimes necessary to remove the stereo component of the music as well as any out of phase information in the very low frequency range. It's recommended to provide a vinyl premaster that already has a balance of high frequency suitable for vinyl production.Įxcessive level in the very low bass can cause the record to skip. Since we need the record to be playable on all types of equipment, it's necessary to limit the High Frequency information. The lacquer cutting system (the next step in vinyl manufacturing) is capable of putting very high peak levels on the record, but only ideal playback systems in optimal conditions will be able to play the sound back without distortion. The source audio files should be provided as a single WAV or AIFF format file for each side, with track spacing as it is intended to appear on the record and with an accompanying PQ sheet, indicating track IDs.MP3 audio is not a suitable source for vinyl production.File resolution should be the highest available, but should not be converted up to a higher resolution.Other file resolutions are acceptable, down to CD quality audio, 16 bit 44.1kHz 24 bit 96kHz WAV or AIFF format file is the vinyl pre-master standard.
What is required for submitting an acceptable vinyl premaster to Microforum? How you have recorded, mastered and the medium you send it to Microforum all contribute to the final sound. Below is what you need to know to have your audio files vinyl ready. If your audio is already mastered for vinyl, you will not require pre-mastering services from Microforum. Pre-mastering is the process of getting your audio ready for the vinyl lacquer cutting stage. Premastering for Vinyl Recordings What you need to know to prepare your audio for vinyl:
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