Member
Joined 2018
A Happy New Year to all.
I decided to start a new project, called "FreeDSP-G" as an Electric Guitar Amplifier Simulator Project.
I previously tested the Amp-Simulator implementation on FreeDSP-OCTAVIA. It was good to learn the potential of SigmaDSP processing. The most critical point was the available number of control pots. However, multiplexing AUXADC will solve the issue. So, I established a concept design drawing as below.
ADAU1467 will fit this project. It has 8 AUXADC and additional many GPIOs.
CyberPit
I decided to start a new project, called "FreeDSP-G" as an Electric Guitar Amplifier Simulator Project.
I previously tested the Amp-Simulator implementation on FreeDSP-OCTAVIA. It was good to learn the potential of SigmaDSP processing. The most critical point was the available number of control pots. However, multiplexing AUXADC will solve the issue. So, I established a concept design drawing as below.
ADAU1467 will fit this project. It has 8 AUXADC and additional many GPIOs.
CyberPit
Last edited:
Member
Joined 2018
Member
Joined 2018
The head-Amp design will be an important part of a hybrid Analog and Digital flavor taste.
A triode-rised non-HIFi design will be suitable for this use. So I make a nonlinear characteristic in this head amplifier part.
A simulation of using J310 JFET
Remarkable second harmonics exist. Well distorted from the small lever signal to the clipping level...
As a well-known JFET 2SK30A simulation, this device can be replaced with 2SK208.
A clean low-level versus distorted high-level drastically. Maybe some metallic taste harmonics...
Changed some parameters
Another simulation of AC frequency response.
This stage shrinks the dynamic range, so the noise floor will increase much. Considering the noise figure and sound fidelities suggests me the PCM1808 SNR (99dB) performance will be enough for this application. (SNR 105dB PCM1802 costs almost 4 times)
CyberPit
A triode-rised non-HIFi design will be suitable for this use. So I make a nonlinear characteristic in this head amplifier part.
A simulation of using J310 JFET
Remarkable second harmonics exist. Well distorted from the small lever signal to the clipping level...
As a well-known JFET 2SK30A simulation, this device can be replaced with 2SK208.
A clean low-level versus distorted high-level drastically. Maybe some metallic taste harmonics...
Changed some parameters
Another simulation of AC frequency response.
This stage shrinks the dynamic range, so the noise floor will increase much. Considering the noise figure and sound fidelities suggests me the PCM1808 SNR (99dB) performance will be enough for this application. (SNR 105dB PCM1802 costs almost 4 times)
CyberPit
Member
Joined 2018
Member
Joined 2018
Member
Joined 2018
PCBA boards are on the way to my residence. It will be arriving In a few days.
Today I'm milling the Enclosure.
CyberPit
Today I'm milling the Enclosure.
CyberPit
Member
Joined 2018
Building hardware...
The milling operation finished.
The rear face should be hardworking for me...
Done
Fitting...
Painting...
Mount the POTs & Switches Board
The Main Board
Installing...
Finish the Building Step
CyberPit
The milling operation finished.
The rear face should be hardworking for me...
Done
Fitting...
Painting...
Mount the POTs & Switches Board
The Main Board
Installing...
Finish the Building Step
CyberPit
Member
Joined 2018
Member
Joined 2018
Member
Joined 2018
I have committed design to FreeDSP Comitee's Git-Hub.
https://github.com/freeDSP/FreeDSP-G
Let's Enjoy the Distortions!
CyberPit
https://github.com/freeDSP/FreeDSP-G
Let's Enjoy the Distortions!
CyberPit