AUDIO / DIGITAL SIGNAL PROCESSING

Hear the math.

Shape a signal. Inspect the spectrum. Explore fixed-point DSP.

01 / Software prototype

Frequency response

Hamming-window FIR

— Floating point— Q1.15 coefficients20 Hz → Nyquist · dB

Signal spectrum

First 2,048 samples · Hann window

— Input— Filtered0 Hz → Nyquist · dBFS

Time domain

First 10 ms · normalized amplitude

Sample rate

FIR group delay

Fixed-point error RMS

Saturated samples

UNDER THE HOOD

From reference model to RTL.

The browser runs a causal FIR convolution and a signed 16-bit fixed-point model. Compare the numerical error, download the source, and reproduce the reference checks.

This filters frequency bands; it does not isolate vocals or instruments. Delay is calculated from the filter length, not measured end-to-end latency.

↓ Download engineering source

Browser & PythonImplemented · reference checks included

SystemVerilogFIR core + comparison testbench

RTL simulationPending · simulator not available here

FPGA resources / timingPending · select a target board

Next hardware stepAudio codec + FPGA interface