Room Correction filters are used to process each channel during playback.
Since each room and playback environment is different, you need to create your own filters to compensate for the room’s acoustics. This is done by by measuring your system — recording the sound of sweeps or other special signals, using a measurement microphone and a PC audio interface – then using a separate room-correction application such as (((acourate))) or DRC to calculate appropriate correction parameters. The InguzTools package can help with this process. The result is a set of WAV files that act as the room-correction filters.
Installing Filters
Room Correction filters should be copied to the “Impulses” folder.
- On Windows, this is .
- On Windows Vista, this is .
- On linux, this is in .
Selecting a Filter
Using the remote control, browse to the plugin menu
This shows a list of all the room-correction filters: these are all the WAV files found in the folder, and “None” to select no room-correction processing.
Push right to select a filter file. The selected room correction filter will take effect on the next track played.
Technical Details
These filters are two-channel impulses in a stereo WAV file format. (32-bit IEEE float is preferred, but all PCM WAV formats are supported). The filters can be as long as necessary, at the expense of processing speed. DRC usually creates 64k-sample filters. If you select a filter longer than 64k samples it will be windowed automatically, to avoid accidentally bringing the CPU to is knees.
Correction filters should be built with the most commonly-used sampling rate (e.g. 44100 for CD material). But they can use any sampling rate, and will automatically be rescaled (using sox polyphase) to the playback rate as necessary.
