You may not increase destination or source address for peripherals. Peripheral DMA will read from a register which has a fixed address.
adc_muestra is declared as uint8, but should be int16.
There is a mismatch between ADC samples/s (48000) and filter sps 1000k samples/s, should be the same.
I did the upgrade but no result
... and your actual workspace bundle... ?
You did not increment the DMA address for the sram which is not a peripheral.
You isr_done will trigger 48000 times a second which will be too much, did you place it wrong?
Declare DMA_done as "volatile"
You restart the AD conversion, but you do not restart the DMAs