Crossover Design
Different speaker types require different frequency ranges. Digital filtering allows the system to control which frequencies are sent to each amplifier channel.
Project / Automotive Audio
Automotive Audio & DSP
A custom multi-channel automotive audio system built around Raspberry Pi and CamillaDSP, combining digital signal processing, custom amplification, and a large speaker system.
CamillaDSPRaspberry Pi8 ChannelsCarPlayDSPAudio Engineering
01 / Overview
Replacing a conventional car audio system with a programmable platform
The goal of this project is to build a high-output, multi-channel audio system where the Raspberry Pi handles the digital processing instead of relying entirely on a conventional aftermarket DSP.
Using CamillaDSP allows the audio system to be treated as an engineering problem. Signal levels, filters, channel routing, volume, and crossover behavior can all be controlled digitally and modified through software.
02 / Signal Chain
From digital source to speaker
01
CarPlay / Audio Source
Audio enters the Jeep through the modern digital source system.
02
Raspberry Pi
The Pi provides the computing platform for audio control and DSP integration.
03
CamillaDSP
Digital processing provides volume control, filtering, channel management, and crossover functionality.
04
Amplifiers
Multiple amplifiers provide the power required by the different speaker groups.
05
Speaker System
Dedicated midrange, tweeter, midbass, and subwoofer drivers create a multi-channel system.
03 / Hardware
A large custom speaker system
CamillaDSP
Open-source digital signal processing software provides the core processing layer for the system.
Raspberry Pi
The Pi replaces the role normally handled by a conventional aftermarket DSP/head unit and provides a programmable platform for the entire system.
Multi-Channel Amplification
AudioControl and DS18 amplifiers provide separate amplification for the various sections of the speaker system.
Custom Speakers
The system combines DS18 midrange and tweeter drivers, dedicated midbass drivers, and Sundown Audio subwoofers.
04 / Speaker System
Separate drivers for separate jobs
Rather than asking a single speaker to reproduce the entire audible range, the system uses dedicated drivers for different parts of the spectrum. This gives the DSP more control over the signal delivered to each amplifier and speaker.
Midrange
DS18 PRO-X6.4BM
Four speakers
Tweeters
DS18 PRO-TW1X/BK
Four speakers
Midbass
8-inch DS18
Two speakers
Subwoofers
Sundown SA Classic
Two 12-inch speakers
05 / Digital Signal Processing
Audio processing as an engineering system
CamillaDSP gives the project a software-defined signal processing layer. Instead of permanently committing the system to one configuration, the processing chain can be changed and tested through software.
+Channel routing
+Volume control
+High-pass filtering
+Low-pass filtering
+Crossover processing
+Gain management
06 / Engineering
More than installing speakers
Gain Structure
The amplifier and DSP levels have to be coordinated so the system can achieve useful output without unnecessarily increasing noise or clipping.
Electrical Noise
The Jeep's electrical environment introduces challenges that are very different from a modern vehicle. Grounding, power distribution, shielding, and signal routing all affect the final result.
System Control
The Raspberry Pi provides a programmable interface for volume control and amplifier control, allowing the audio system to become part of the larger Jeep Computer project.
07 / Vehicle Integration
Audio and computing become one system
The audio system is not being developed independently from the Jeep Computer. The Raspberry Pi provides a common computing platform, allowing the audio controls, CarPlay interface, amplifier control, and vehicle monitoring system to work together.
Input
CarPlay / Audio Source
Processing
Raspberry Pi + CamillaDSP
Output
Amplifiers + Multi-Driver System
08 / Development
An ongoing audio engineering project
The system continues to evolve alongside the Jeep Computer. Future work includes refining the DSP configuration, improving electrical noise performance, tuning the system, and integrating additional controls into the vehicle's central computer.
Related Project