new FM demodulator

keenerd keenerd at
Thu Jan 30 15:35:29 UTC 2014

On 1/30/14, keenerd <keenerd at> wrote:
> On 1/30/14, Anders Lynge Esbensen <anders at> wrote:
>> I've implemented a faster FM demodulator for rlt_fm.
> Let me see if I can get a fixed-point version written.

I've cleaned it up and it is in my repo.  You can enable it with "-A ale"

Some quick benchmarks:
std: 10%
fast: 7%
lut: 7%
ale: 7%

Sound quality is also noticably worse with ale, but that might be from
an error in the fixed point conversion.  How does the math look to


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