Compact Audio Playback Device
Jamtech have produced a prototype device for a client who needed a compact digital recorder aimed at the steel stringed musical instrument market.
Jamtech used their skill and knowledge to:
- Design a custom 3D printed enclosure with switch flexures
- Design build and test a custom PCB with embedded low cost 16-bit microcontroller
- Author embedded firmware
Jamtech produced this proof of concept functional prototype in less than 8 weeks which included PCB design, enclosure design and embedded firmware programming.
Approx dimensions: 120mm(W) x 25mm(H) x 40mm(D)
How does it work?
Analogue audio-in, sourced for example from a magnetic pickup, is pre-amplified before being fed to the audio coder/decoder (CODEC). The microcontroller (MCU), in real time: i) synchronises with the CODECs digitised audio stream ii) records audio data to memory, and iii) outputs the stream to audio-out. During replay the memory is read and merged with the audio-in to produce the analogue signal at audio-out. The user buttons are used to control when the unit is in record, playback, or erase modes.
The audio recording and replay merge worked very well for a first prototype. Presenting the prototype in its 3D printed enclosure enhanced the realisation of the products commercial viability.
Further development work is expected to follow.