FFT_SIZE.....needed....

[Bas ON5HB]

After a lot more testing....it's smart to set this as follows:

Samplerate / 10 and then select a power of 2 higher then the number you get.

So 1MSPS divided by 10 gives 100000, the nearest power of 2 is 131072...so you should set that number.

If you have 10MSPS, then it's 1000000....so the size should be 1048576

With the RX888 at 30MHz = 60MSPS = 6000000 => so 8388608 should be used.

Typical this should give a good number to start with.

Table Power of 2 found here: https://www.mymathtables.com/numbers/power-exponentiation/power-of-2.html

Setting this number too high just eats some memory, setting too low gives poor audio, stuttering, low performance or even crashes.