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"I would like to thank you for the superb work for the 16" Transcription. We are especially thankful for the faster turnaround time you provided, which was above and beyond the fastest selected option that we chose. Our 92 year old cousin was able to hear it before her serious decline. Also, I wanted to let you know that the History Center in ..."

Bias

An electrical signal of relatively high frequency applied to magnetic tape during the recording process, along with the audio signal, to linearize the transfer characteristic of magnetic recording tape. The bias frequency is generally in the range of 70 to 120 kHz (HF bias).