I like to keep readers updated as I review these products. Dropping little nuggets here and there is surely more entertaining than waiting a month for any news at all to drop.
Tonight I have been taking a look at the filters in the E70 (ESS style). Seven filters in all, all fairly typical FIR oversampling filters. Topping is not using its own proprietary code, they are sticking to the preprogrammed filters standard to the ESS chipset.
Nothing really out of the ordinary here, except for the Apodizing filter. Apodizing filters seem to always be minimum phase in variety. Not in this case. Here we have a linear phase Apodizing filter. I thought it was a mistake at first, but no, it apparently isn't. To me it looks like any other linear phase fast FIR filter. Still, I am not shutting the book on this one. More research is needed before I say any more about linear phase Apodizing filters.
You can cycle through all seven in the slideshow below.
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