Signal Processing Platform
Real DSP.
Real Hardware.
Real Results.
RadioSonic is a portable, low-cost platform for hands-on digital signal processing education, operating in the acoustic domain, no RF license required.
Launching
Coming this summer.
SPS-RL-01-02
ESP32-S3
Dual-core Xtensa LX7
TLV320AIC3204
I²S streaming ADC/DAC
2–6mics
Beamforming & angle of arrival
10 Hz - 20 kHz
Line In bandwidth
Wi-Fi
2.4 GHz + USB 2.0
8MB + 8MB
Flash + PSRAM
65 × 56mm
Raspberry Pi HAT form
// platform capabilities
A complete platform for learning real DSP
No prior programming experience required. Students focus on signal-processing concepts using integrated firmware and structured lesson plans.
2–6 microphones
Onboard mics at 30 mm spacing, expandable to 6 via codec port, for beamforming and angle-of-arrival demos.
I²S streaming ADC/DAC
TLV320AIC3204 codec with stereo line in, line out, and headphone out. Real-time DMA ping-pong buffering.
Drop-in lesson firmware
DMA framework included. Lessons slot in as self-contained C include files, with no low-level driver work.
Jupyter Notebook labs
Post-processing in Python. Notebooks expose code for curious students; no programming expertise required to run them.
"RF in slow motion"
Creative approach for wavelength-consistent SDR-style experiments using audio-frequency propagation.
8 MB flash + 8 MB PSRAM
Ample memory for audio recording, long filter pipelines, and buffering experiments. Wi-Fi enables PC data transfer.
// core framework
Signal processing code crafted for learning.
The firmware provides real-time DMA sample streaming between ADC and DAC. Each lesson is a drop-in processing block that students implement directly, working at the algorithm level rather than wrestling with drivers or hardware setup.
FIR & IIR digital filters: windowed, least-squares, biquad, Direct Form I & Transformed DFI I
Spectral analysis: FFT, convolution, correlation, transfer functions, spectrograms
Modulation: BPSK, QPSK, QAM, OFDM at acoustic frequencies
Beamforming & array processing: angle of arrival with 2–6 mic configurations
