Yamaha PM5D Owner's Manual - Page 12

2 Introduction About the channel structure of the PM5D The PM5D provides the following input channels and output channels. ❏ Input channels This section processes input signals and sends them to the STEREO bus or MIX buses. There are three types of input channel, as follows. • Input channels 1-48 These channels are used to process monaural signals. By default, the input signals from the monaural analog input jacks (INPUT jacks 1-48) are assigned to these channels. • ST IN channels 1-4 These channels are used to process stereo signals. By default, the input signals from the stereo analog input jacks (ST IN jacks 1-4) are assigned to these channels. • FX RTN channels 1-4 These channels are used mainly to process the return signals (stereo) from the internal effects. By default, the left/right output channels of internal effects 1 through 4 are assigned to these channels. Hint Signal assignments to the input channels can be changed as desired. ❏ Output channels This section mixes the signals sent from input channels etc., and sends them to the corresponding output jacks or output buses. There are three types of output channel, as follows. • MIX channels 1-24 These process the signals sent from input channels to MIX buses, and output them from MIX OUT jacks 1 through 24. These channels are used mainly for foldback or as sends to external effects. The signals of MIX channels 1-24 can also be sent to the STEREO bus or MATRIX buses. • MATRIX channels 1-8 These process the signals sent from MIX channels or STEREO A/B channels to MATRIX buses, and output them from the MATRIX OUT jacks. This allows MIX channels or STEREO A/B channels to be mixed at the desired balance for output. • STEREO A/B channels These process the signals sent from input channels or MIX channels, and output them to STEREO OUT jacks A/B. These channels are used as the main stereo outputs. Normally, the same signal is sent from the STEREO A and B channels. However, it is also possible to use the STEREO B channel as the center channel for three-channel L/C/R playback. Regarding word clock synchronization The signal used to synchronize digital audio signal processing is called "word clock." Normally, one device transmits a reference word clock signal, and the other devices receive this word clock signal and synchronize to it. In order to transmit or receive digital audio signals to or from an external device via the PM5D's digital input/output jacks or via a digital I/O card installed in a slot, the word clock must be synchronized between the devices. Be aware that if the word clock is not synchronized, the signals will not be transmitted correctly, and unpleasant noise will occur. Hint • For details on synchronizing the word clock of the PM5D and external devices, refer to the explanation of word clock in Operating section "Chapter 4. Connections and setup" (➥ p.31), and to the Reference Section "WORD CLOCK screen" (➥ p.199). • As an exception, digital signals that are not synchronized with the PM5D can be input via a digital I/O card that contains a sampling rate converter, or via the 2TR IN/OUT DIGITAL jacks. 12 PM5D/PM5D-RH Owner's Manual Operating section