FIR Designer is ideal for creating complete single channel and multi-way loudspeaker presets (that include mixed IIR + FIR filtering). When creating a preset, both the workflow’s design sample rate and the export file format can be chosen to match those of the processor/amplifier being used.
Loudspeaker measurements of any sample rate can be imported into FIR Designer’s workflow, which supports design sample rates of 12, 24, 44.1, 48 88.2, 96, 176.4 & 192 kHz for all preset processing.
Previously, the chosen workflow design sample rate was used for all preset elements including delay, IIR and FIR filters. This created a challenge when designing filtering for processors that use one sample rate for the bulk of core processing, such as 96 kHz, but only accept FIR filters at a different sample, such as 48 kHz.
Recent FIR Designer and FIR Designer M updates offer enhanced flexibility & customization by enabling the export of the FIR filter at a different sample rate than the other preset components, such as IIR filters. On the FIR Designer ‘Export’ tab, at the end of the preset-creation process, use the new drop-down menu to choose the output sample rate for the FIR filter, before choosing the desired file format for export.
With a separate FIR filter output sample rate selected, FIR filter truncation and windowing are applied at the selected output sample rate. The FIR filter is then resampled back to the workflow sample rate for plots such as the Wavelet view.
Learn which loudspeaker measurement file formats can be imported into FIR designer for use in preset creation.