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Digital Mixers
Using a DS2416 to record a CD
The DS2416 can be used as a mastering tool to ''sweeten'' the audio material before it is recorded to a CD. This can be done with an ''internal'' CD recorder (that is, a CD recorder integrated with the computer that also contains the DS2416), or with an ''external'' CD recorder.
When recording to an internal CD recorder, a two-step process is used. First, the audio material is recorded to the computer's hard disk. This is when the DS2416 can be used to make final adjustments to the material before it is committed to CD. Then the material is recorded to a blank CD from the hard disk, using the computer's CD recording software.
When using an external CD recorder the DS2416 is connected to the recorder using the ''D OUT'' connector of the DS2416. In this configuration the DS2416 can perform the mastering ''final adjustments'' as the CD is recorded, without recording first to hard disk.
When recording to an internal CD recorder, a two-step process is used. First, the audio material is recorded to the computer's hard disk. This is when the DS2416 can be used to make final adjustments to the material before it is committed to CD. Then the material is recorded to a blank CD from the hard disk, using the computer's CD recording software.
When using an external CD recorder the DS2416 is connected to the recorder using the ''D OUT'' connector of the DS2416. In this configuration the DS2416 can perform the mastering ''final adjustments'' as the CD is recorded, without recording first to hard disk.
NOTE: It is important to note that the CD standard calls for all audio material to be sampled at 44.1KHz. Any other sampling rate cannot be recorded onto a CD.
The DS2416 has no means to convert the sample rate of audio material from one rate to another. If the material to be recorded to CD exists at another sampling rate, it must be ''converted'' to 44.1KHz before it can be recorded on the CD. There are several ways to do this.
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Send the audio material through a sample rate convertion process, available either in the computer recording software, or through an external sample rate conversion unit.
Send the audio material to the analog input of the DS2416, and set the DS2416 to lock to its internal clock at the 44.1KHz rate. Then the audio will be at the correct sampling rate for CD recording.
The steps listed below describe how to connect the DS2416 ''D OUT'' digital output to the digital input of an external CD recorder.
NOTE: Before beginning this procedure, make sure that both the CD recorder and the computer with the DS2416 are turned OFF.
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Connect the DS2416 'D OUT' to the S/PDIF digital input of the CD recorder using a good-quality 75-ohm coaxial cable, with an RCA-type pin plug on each end.
NOTE 1: A good-quality ''stereo'' cable may be used, but this is less desirable. The CD recorder may not recognize the incoming audio signal. This effect becomes more pronounced when long cables are used.
NOTE 2: The DS2416 'D OUT' may also be connected to an ''AES-EBU'' digital input that typically uses a 3-pin ''XLR'' connector at the input. A 'digital-grade' balanced/unbalanced in-line transformer (75-ohm to 110-ohm) will be required for this connection. However, some CD recorders still may not recognize the signal from the DS2416, since the code in an S/PDIF signal differs slightly from the AES-EBU code.
NOTE 2: The DS2416 'D OUT' may also be connected to an ''AES-EBU'' digital input that typically uses a 3-pin ''XLR'' connector at the input. A 'digital-grade' balanced/unbalanced in-line transformer (75-ohm to 110-ohm) will be required for this connection. However, some CD recorders still may not recognize the signal from the DS2416, since the code in an S/PDIF signal differs slightly from the AES-EBU code.
Turn the computer ON, then turn the CD recorder ON. If the audio material is coming into the DS2416 digitally, confirm that DS2416 is word clock ''locked'' to the incoming audio, and that the sample rate is 44.1KHz. If the audio is coming into an analog input of the DS2416, confirm that the DS2416 is set to its internal clock at the 44.1KHz rate. Place a blank CD in the CD recorder, and place the recorder in ''record ready'', or ''record pause''.
At this point the CD recorder will indicate that it is recognizing the digital signal from the DS2416. This is usually indicated with a ''record-ready'' display on the front panel of the recorder.
Reference: DS2416 Owner's Manual, pg. 10-11
