Advanced Audio Master Quality Recording
The CRW-F1's Advanced Audio Master Quality Recording mode now supports 1x
and 8x writing speed added to original 4x speed mode. There are various types of
CD-R media in market now. Some are designed for high-speed writing. Some are
suitable for low-speed writing. Customer can select best writing speed for Audio Master Quality Recording among 3 speed modes, 1x, 4x and 8x to get lowest jitter level.
Also Auto- speed selection mode is available in Advanced Audio Master Quality
Recording mode of the CRW-F1. Enabling this Auto mode, the CRW-F1 automatically selects best writing speed for the media to write data at best results. The Advance Audio Master mode can record music up to 79 minutes when 870 MB media is used.
How does Audio Master work?

Audio CDs burned using standard methods display considerably higher jitter values than CDs which are pressed. The Audio Master feature reduces the jitter values by up to 30% in order to achieve the best possible sound quality on audio tracks on CD-R disks. This results in significant audible clarity in the treble and central range, full bass reproduction and convincing interpretation in terms of space. The CRW F1 has its own audio CD burn mode specially for audio CDs.
What is Jitter?
A CD-R/RW drive writes music data on a CD in the form of pits and lands. The digital information in the pits and lands is decoded by the scanning unit in the CD-player and played. Various influential factors (e.g. component tolerances, ripple voltage, electromagnetic fields) however prevent the signals of the pits and lands from reaching the CD-player's scanning unit at exactly the right time. This delay is referred to as "jitter".

These two graphics recorded using an oscilloscope shows the difference in quality:
The left-hand graphic is clearly indicative of the fact that the audio signal is considerably less
clear than the one on the right. The less clear the image, the
higher the jitter factor. Thanks to Audio Master, the audio signal in the graphic on the right is
much clearer and therefore of better quality.
The Yamaha solution

With the Audio Master Quality function in the CRW F1 , YAMAHA has succeeded in dramatically reducing the jitter value. When the CRW F1 is in Audio Master mode, it writes longer pits and lands than when in standard burn mode.

 
Thanks to the variable linear speed, the CD-player reads the CD generated using Audio Master at the same speed although the pits and lands are considerably longer. This means that the percentage of jitter is reduced dramatically in the recording.
The memory capacity of a 650 MB or 700 MB medium is thus 63 or 68 minutes, respectively. The CRW F1 Series supports up to 870 MB media for 79min Audio CD in best quality. While the CD-player's laser unit reads the data, the photo detector receives more information per pit or land. The jitter factor remains under 20ns, i.e. very low, or reduced by up to 30%.