Data AcQuisition And Real-Time AnalysisScope - Spectrum - Spectrogram - Signal Generator
Software for Windows
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Multi-Channel Output Controls
Important: Even if the button is enabled, it does not indicate whether true multi-channel capability is available. If you have a multi-channel sound card, you must specifically enable multi-channel operation before starting Daqarta.
You can also select any two of the active channels to be monitored as Left Out and Right Out, which means they will be processed and displayed as normal Left and Right waveforms, spectra, averages, or spectrograms, including in Decimate mode, and can be used as Trigger Sources.
Please note: You cannot record multi-channel outputs with DDisk at the present time, not even the selected monitor channels. If you use Save Trace as .DQA Data File (or .WAV, .DAT, or .TXT files), however, the current 1024-sample traces for the selected monitor channels will be saved.
Note that Daqarta's own volume controls (F9 key), or the Windows volume controls (speaker icon in the system tray), only support stereo outputs unless you are using Windows XP (which uses Daqarta's multi-channel slider dialog). For Vista, 7, 8, and 10 you'll need to use the custom control panel that comes with your multi-channel card to control all channels.
Note that even if you don't have a multi-channel sound card, you can still use the Multi-Channel Outputs mode. Similarly, if you have a 4-channel or 6-channel card, you can still use 8-channel mode. In such cases, Windows will combine the selected channels to fit the actual channels available.
You can't tell which channels are being combined just by looking at Daqarta's output display; you will need to determine this via listening tests or by using a loopback cable to feed selected outputs back to the input channels for examination.
Please note that when this happens, it is possible to have output clipping even though the Generator Clip Indicator is not activated. This can arise when the Stream Levels are properly limited to 100% or less for the designated output channels, such that they wouldn't clip with a true multi-channel card, but the Windows-combined total exceeds 100%.
The Multi-Channel Test Setup can simplify the above tests, as well as providing an example for creating your own setups.
GenMultiDlg=1 opens the dialog, GenMultiDlg=0 closes it, and GenMultiDlg=x toggles between open and closed.
Note that you do not need to open this dialog to change its controls directly via macro command.
See also Signal Generator Control Dialog.
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