Controls: Gen Dlg >> Stream >> Wave >> Play >> 0-7
Macros: Play0-Play7, PlayX0-PlayX7

By default, the 8 Play file locations show as simply Play 0 through Play 7 when Play files are not loaded. To load a file to a particular location, click on the associated button. A standard Windows Open dialog will pop up to allow you to select a file.

Play files are assumed to reside in Daqarta's own User_Data directory. See the Open Existing Data File topic for tips on opening files in other directories, as well as copying, moving, or deleteing files.

Files may be either ordinary .WAV or .DQA files, or custom user-created .DAT files. A .DAT file is assumed to be a series of 16-bit signed integer values in 2s-complement binary format. A special Txt2Dat utility is provided to allow conversion of plain text files to this format.

The .WAV or .DQA files may be mono or stereo. If you load a stereo file, it will appear in two adjacent Play locations. The .WAV files may be either 8-bit or 16-bit. 8-bit files will be converted to 16-bit data internally when loaded.

The actual file extensions are not important here; Daqarta first looks inside the file for the .WAV header (which is also present in a .DQA file), and if that is not present the file is assumed to be a headerless 16-bit mono .DAT file. There is no DAT File Format Dialog to adjust for other formats here, as there is for a normal Open operation, so if you have another file type you may want to open and re-save it with a .WAV or .DQA format ahead of time. Otherwise, you can use whatever file extensions suit your needs. However, note that the file selection dialog will only show .DQA, .WAV, and .DAT files.

Once the file is loaded, the button will change to show the file name instead of the Play 0-7 default. The small square button at the right end will change to [X] to allow subsequent removal of that file from the setup.

If you load a stereo file, it will occupy two adjacent buttons. Both will show the same file name, but the small removal buttons at the right ends will show [L] for the upper and [R] for the lower to show that these are Left and Right channels of a stereo pair, and must be removed as a unit.

When you first load a Play file, the message line on the main Daqarta screen will also show the number of bits, the file type (.WAV or .DAT), and the number of samples. You can view this information for any loaded Play file by right-clicking on its button. (Right-clicking on an unoccupied button will take you to this Help page.)

Much more detailed file information is available from the File Info dialog ( ALT+F, I), but that only shows the file most recently loaded and will be overwritten by any subsequent file load, whether it is Arb, Play, or a regular data file.

If you save a Daqarta Setup that uses Play files, the file names are saved as well. The name and path must be within the Windows limit of 260 characters.

If you are planning to copy a setup file to another system running Daqarta, you must be aware of this structure. Besides insuring that any relevant Play files are present on the other system, you must also insure that they are in the same relative locations. In this case it may be best to load the setup on the new system, and re-load the Play files into it.

Note that any Play files that are part of a setup will always be loaded with that setup, even if they are not active in any stream. Thus, if you modify a setup and no longer need an Play file, removing it will reduce demands upon system memory.

If you wish to remove a file from a setup that you otherwise want to save, click on the small [X] (or [L] or [R]) button at the right end of the file button. You will be asked to confirm that you want to remove this file from the setup, after which the file button will be restored to its original 'Play n' state with a blank removal button.

For stereo files, clicking on either the [L] or the [R] buttons will remove both channels together.

Macro Notes:

Use A.L.1.Play0="MyFile.DQA" to directly load the indicated file as Play0 for Left Stream 1, and also select that as the Wave type. As long as the file is present and compatible, there will be no user prompts. This will work no matter what dialogs are open.

If you don't use the A. prefix and the Play dialog is not open, the command will be ignored.

If the Play dialog is already open, Play0= without a name will pop up the File Open dialog showing all DQA, WAV, and DAT files, but with no default name. To specify a default filename, it must be enclosed with quotes.

When there are multiple Play files loaded, only one may be selected (button depressed) in any given stream. That one will be activated by Wave=Play for that stream.

Loading a file to a given stream will also select it for that stream. The file will be present in all other streams of both channels, but not selected. To select it for a specific stream, use Play0=1 to Play7=1 as needed for that stream.

Use A.L.1.PlayX0= (value ignored) to unload Play0, if present, from Left Stream 1. There will be no confirmation prompt and the Play dialog does not need to be open.

If you don't use the A. prefix the Play dialog must be open, or the command will be ignored. You will be prompted to confirm the removal.

See also Wave Dialog, Play Wave.

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