Yamaha D24 Owner's Manual - Page 16

Choosing MO Disks 7 The following table lists the approximate recording times available using 640 MB MO disks at a variety of recording resolutions and sampling rates. Bit Sampling Rate 44.1 kHz 48 kHz 16 88.2 kHz 96 kHz 44.1 kHz 48 kHz 20 88.2 kHz 96 kHz 44.1 kHz 48 kHz 24 88.2 kHz 96 kHz Track minutes (mono) 120 min 111 min 60 min 55 min 96 min 88 min 48 min 44 min 80 min 74 min 40 min 37 min 2 tracks 60 min 55 min 30 min 27 min 48 min 44 min 24 min 22 min 40 min 37 min 20 min 18 min 4 tracks 30 min 27 min 15 min 13 min 24 min 22 min 12 min 11 min 20 min 18 min 10 min 9 min 8 tracks 15 min 13 min - - 12 min 11 min - - 10 min 9 min - - Higher recording resolutions and sampling rates offer higher quality, but produce more data, which reduces the total available recording time. Use the Remain function to check the available recording time. See "Checking the Time Remaining" on page 38 for more information. The number of tracks available for simultaneous recording can be expanded using multiple D24s. See "Multiple D24s" on page 144 for more information. The D24's internal MO disk drive supports 230 MB, 540 MB, and 640 MB MO disks. See the Yamaha Professional Audio Web site at the address below for up-to-date news on MO disks. Preformatted MO Disks MO disks preformatted for use with PC or Macintosh computers can be used with the D24, but require formatting before use. See "Formatting MO Disks" on page 26 for more information. Calculating the approximate Recording Time You can calculate the approximate recording time for a given recording resolution, sampling rate, and disk capacity as follows. First multiple the recording resolution by the sampling rate to get the number of bits produced per second (e.g., 16 × 44100 = 705,600 bits per second). Then divide that by eight to get the number of bytes per second (e.g., 705,600 ÷ 8 = 88,200 bytes per second). Multiply that by 60 to get the number of bytes required per minute (e.g., 88,200 × 60 = 5,292,000 bytes per minute, or 5.292 MB/min). Now you know the number of megabytes required to store one minute of audio data, simply divide the capacity of the disk by that number to get the approximate number of track minutes (e.g., 640,000,000 ÷ 5,292,000 = 120 minutes). Finally, divide the number of track minutes by two, four, or eight to get the approximate recording time available for several tracks (e.g., 120 ÷ 8 = 15 minutes for 8-track simultaneous recording). D24-Owner's Manual