I'm really struggling to find a solution (low cost) that can do what I need. What I want to build in a single two-way bluetooth powered speaker with an active crossover.
Needs:
-Less than $100USD for DSP, amp, bluetooth module, and PSU
-Must covert 2-ch input to mono output
-Must have crossover and parametric eq
-decent quality amp design (2x25w range)
I think a RPi with a DSP board and amp board would work but it is starting to get too costly. Looked at some 3e Audio/Dayton audio boards but I can't confirm if I can mix channels.
What are my options? Maybe I am just not searching for the right thing.
Needs:
-Less than $100USD for DSP, amp, bluetooth module, and PSU
-Must covert 2-ch input to mono output
-Must have crossover and parametric eq
-decent quality amp design (2x25w range)
I think a RPi with a DSP board and amp board would work but it is starting to get too costly. Looked at some 3e Audio/Dayton audio boards but I can't confirm if I can mix channels.
What are my options? Maybe I am just not searching for the right thing.
Seems likely its not possible to do all that for $100.
How would you plan to start out, with digital audio or analog?
If digital audio source, then you need a DSP chip, clocking, various power supplies, maybe USB to I2S board, or USB to SPDIF in order to go into the DSP chip. Coming out of the DSP chip you need a DAC and a power amp, or else a switching amp that can work as a dac too (a power dac). Fair amount of stuff on that list once all the little details are considered. It should all be in a metal case for shielding reasons. Doing it at lowest cost might mean awful sound quality even if lowest cost is over $100.
How would you plan to start out, with digital audio or analog?
If digital audio source, then you need a DSP chip, clocking, various power supplies, maybe USB to I2S board, or USB to SPDIF in order to go into the DSP chip. Coming out of the DSP chip you need a DAC and a power amp, or else a switching amp that can work as a dac too (a power dac). Fair amount of stuff on that list once all the little details are considered. It should all be in a metal case for shielding reasons. Doing it at lowest cost might mean awful sound quality even if lowest cost is over $100.
The JAB3+ would probably be a good solution for you, but you would have to program the DSP chip (ADAU1701) to implement the active crossover and channel routing.
I intend to write code for this board in the near future to provide a cell phone interface for the the crossover and routing and bass enhancement, etc., but that is about 3 projects down the queue.
The top two items on my to-do list are recasting all of the code I have for controlling the ADAU1701 as nice library calls and refinishing our living room. The code is described at the audiodevelopers.com website, and you can see how it was adapted to use an earlier version of that Sure amp board at this link. The code refactoring into library modules is coming along--I've got the overall design done and about half of the code is converted.
Unfortunately, my wife is pushing for the living room refurbishing, and she usually (always?) gets priority.
I intend to write code for this board in the near future to provide a cell phone interface for the the crossover and routing and bass enhancement, etc., but that is about 3 projects down the queue.
The top two items on my to-do list are recasting all of the code I have for controlling the ADAU1701 as nice library calls and refinishing our living room. The code is described at the audiodevelopers.com website, and you can see how it was adapted to use an earlier version of that Sure amp board at this link. The code refactoring into library modules is coming along--I've got the overall design done and about half of the code is converted.
Unfortunately, my wife is pushing for the living room refurbishing, and she usually (always?) gets priority.
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Thanks for the info Neil. The Wondom amps came up in my research and it is my understanding that the Dayton Audio amps were just rebranded Wondom amps.
I don't mind the idea of needing to program the DSP chips and purchasing and add on boards or programmers as I will likely make use of the equipment for other projects. Where my research came to a halt was in regards to the channel routing. It wasn't clear if routing could be done at the digital signal level.
Maybe I should just order one to play around with.
I don't mind the idea of needing to program the DSP chips and purchasing and add on boards or programmers as I will likely make use of the equipment for other projects. Where my research came to a halt was in regards to the channel routing. It wasn't clear if routing could be done at the digital signal level.
Maybe I should just order one to play around with.
You are asking a lot for 100$. Hope you don´t expect good sound too!
This one covers quite a bit of your wishlist:
ZOUDIO electronics
This one covers quite a bit of your wishlist:
ZOUDIO electronics
No problem--there are mux, mixer and selector cells in SigmaStudio that will route any combination of inputs to any output channel.
That could be a motto or subtitle for diyAudio.
Yes, definitely a small budget that will require compromises. My target for sound quality is quite low, the benchmark to beat is commercially available portable Bluetooth speakers and home automation speakers.
The Zoudio AIO4CH seems to check all the boxes and appears to have good manufacture support on DIYAudio judging from the dedicated thread. Thank you for the recomendation.
The Zoudio AIO4CH seems to check all the boxes and appears to have good manufacture support on DIYAudio judging from the dedicated thread. Thank you for the recomendation.
It is possible, STM32 Nucleo with STA350BW, Arduino MCU for writing DSP configuration to STA350BW over I2C and some SPDIF to I2S converter, 24V DC supply and you get it.