This page describes how to use iSRC to convert or requantize files. It is built into the program.
Click on a picture to see it in full size.
Adding and removing files:
Click (1) to add files (you can select many) or (2) to add all files in the selected directory. Button (3) removes selected file from the list while (4) clears the list. By using (5) you can select the directory in which converted files will be saved.
The list (6) consists of two columns. The fist (6a) one holds filenames, the second one (6b) shows files’ parameters.
Setting output format:
This group controls output format. Use dropbox (1) to select one of the following sample rates:
44100, 48000, 88200, 96000, 176400, 192000, 352800, 384000.
Two dropboxes marked (2) select output file format. The top one can be set to:
- WAV – file will be saved in WAVE format,
- AIFF – file will be saved in Apple’s AIFF format.
The bottom checkbox selects sample format. Available values are:
- fix – samples are saved as fixed-point integers. Length of sample depends on bit depth (3) spinbox setting.
- float32 – samples are saved as single precision floating-point numbers. Signal’s value is limited to <-1;+1>.
- float64 – samples are saved as double precision floating-point numbers. Signal’s value is limited to <-1;+1>
Spinbox (3) allows to choose bit depth, allowed range is 12 to 24 bits.
Textedit (4) contains filename template. Several tags have special meaning:
- %i -number on the file list,
- %n – base name of input file,
- %f – output samplerate
- %b – output bit depth
- %c – output channels number
- %e – filename extension (wav for WAVE files, AIF for AIFF format)
Background color signals if template is valid or not. Green means that everything is all right. Yellow means several files may be saved under the same filename. Red means invalid template has been given. Reason of warning or error will be shown upon start of conversion.
For example, according to those settings and name template, file named input.wav will be saved as: input-44k-16b.wav
Other settings:
Other settings group has only two checkboxes. The first one (1) enables overwriting files. If this option is not checked and a file already exists, it will not be overwriten. Select this only if you are sure you want to overwrite files.
The second checkbox (2) disables multithreading. iSRC will use as many processor’s cores as possible. If you wish to convert only one file at a time select this option.
Control:
This group is used to start, pause and stop conversion.
Clicking “Start” (1) will start conversion process. Please note many controls are disabled (“grayed out”) and cannot be used when conversion is in progress.
Click “Pause” (2) to pause conversion in progress. This button is active only during conversion!
The third button – “Stop” (3) – can be used to abort conversion in progress. After using it you will not be able to resume conversion! You will be asked if you really want to abort current process.
Conversion:
During conversion some controls are disabled.
The progress bar (1) shows current progress.
On the file list results of conversion are shown. The first file (2a) was converted succesfully. The second one (2b) is being converted and progress is 27%. The third one (2c) awaits conversion. The last file (2d) will not be converted. Input sample rate of 16 kHz is not supported.
Please note that buttons “Pause” (3a) and “Stop” (3b) are active now. You can use them to pause or abort conversion.
Other:
You probably know what button “Help” (1) does because you are browsing the help now.
“About” (2) button shows a dialog with information about the program.
“Quit” (3) button ends the program. If conversion is in progress you will be asked if you want to abort it.
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