Hello,
I can see that there is a high precision Butterworth filter module, but the LR module I can find is not a high precision one. Is there a reason for that? I know I can use two BW filters to create the equivalent LR filter, but in makes the design very complex.
Best regards,
Yair
6:07pm
Hi Yair,
At the moment there is no HP implementation of the LR Crossover module. I suppose the reason is that we haven't received enough demand for such a thing. Do you mind sharing your reasons behind needing it?
Thanks,
Gary
10:02am
Hi Gary,
We are using AW on Danville SHARC based boards for our speaker products (see www.innovoaudiodesigns.com). For most crossovers used today, a LR type filter is the preference. For performance and audio quality, a HP type filters are always used in our designs.
The AW crossover module/subsystem can use high performance LR filters for its implementation, however it has a design time fixed filter slope for all crossover bands; however, in real life designs, we need to use different filter slopes for different bands, to match the speaker driver used and the acoustic characteristic of the speaker. For these reasons, the Crossover module is not useful for us.
As a result, whenever the design is called for a LR type filter/crossover, we need to use twp cascaded HP Butterworth filters on each end of the crossover "band" (two BE filters to for the high pass filter, and twp BW to form the low pass filter). If we had a high performance LR type filter, we could use only two modules, instead of four. Remember, that we might need to use different slopes for the LP and HP filters.
Please let me know if you have any question about that.
Best regards,
Yair
2:12pm
Hi Yair,
We do not have development of such a module planned. If you really need it, please contact sales@dspconcepts.com.
Thanks,
Gary
3:08pm
H Gary,
As we have a solution right now, I do not see a reason to have custom work done for this. I'll continue to use our implementations (using cascaded BW filters).
I should be a good addition to one of your next releases regardless (as my use case it probably common to a lot of users).
Best regards,
Yair