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Build Amazing Speaker

abolfazlnejatian

Hey everyone

I’m gonna build up a PC speaker with Arduino, and my desired speaker detailed as follows:

  1. 3.5 mm jack, Bluetooth and USB as an input section.
  2. I need to make some process on my input signal (FFT and cross-correlation) in order to create visual EQ on LCD, Reinforcing/Weakening some signal’s frequency in case of need and pass signal throw an adaptive noise cancellation like RLS (or LMS algorithm in the case of memory shortage) and a vocal commander, turn on/down volume, next/previous and pause/stop command with voice command.(it’s totally depend on the processing speed and memory, I doubt Arduino can handle it image)
  3. And in output section, two approximately 60 Watt speakers (I don’t know which one is more accurate!!! two mono amplifier or one stereo amplifier.)

So gimme your point of views about it and its Strengths/weak points.

I did a lot of DSP works in MATLAB environment and I know about the basis of signal processing but I don’t know about the feasibility of run it on Arduino(maybe due or mega can deal with it)

And would you please recommend your intended modules for section one and three of my question.

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  • Former Member
    0 Former Member

    There are a lot of parts to this project, personally I would challenge it a bit at a time rather than trying to accomplish everything at once.

     

    Firstly I would look at getting a 2 channel amplifier that could handle your speakers and has a basic input stage using just the 3.5mm jack. This is the part that is going to define the majority of your power requirement, which produces another problem at the very first instance. How are you going to power it? Once you have worked out a power supply that can drive the amplifier, you will need to consider getting a slightly larger one that can handle the other components later on. Maybe the LCD screen will need an additional 1.5A on top of the processing etc..

     

    Once you have the amplifier up and running, you can take a copy of the signal from the input stage to be able to send it to the DSP. How are you going to do this without disrupting the signal going to the amp? its possible that you can run the signal into the DSP and then back out to the amp but this would likely be more complex. Running the DSP with a copy of the signal/ as a parallel process would allow you to still use the basic system while you are working on it.

     

    There will likely be some lag between how fast the DSP can perform the FFT and use the results in a visual display when compared to the sound that comes out of the speakers, this is inevitable and this is why the faster the DSP is and the more efficiently you can get it to perform is paramount.

     

    Next is the display, can the DSP handle the display also? or would a separate controller be needed to send the output of the DSP to?

     

    Sorry I haven't offered any specific help at this stage but it is a large project with a lot of other complexities that could make any suggestions difficult without knowing more exact details. The synopsis of this is to Keep It Simple from the beginning and slowly work upwards, unexpected obstacles can and will arise.

     

    EDIT

    ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

    A quick side note on the power supply, driving 2 x 60W speakers at 12V = minimum power supply requirement of 12V at 10A without any other considerations is going to require something pretty beefy. In power supply language Beefy = Expensive

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  • Former Member
    0 Former Member

    There are a lot of parts to this project, personally I would challenge it a bit at a time rather than trying to accomplish everything at once.

     

    Firstly I would look at getting a 2 channel amplifier that could handle your speakers and has a basic input stage using just the 3.5mm jack. This is the part that is going to define the majority of your power requirement, which produces another problem at the very first instance. How are you going to power it? Once you have worked out a power supply that can drive the amplifier, you will need to consider getting a slightly larger one that can handle the other components later on. Maybe the LCD screen will need an additional 1.5A on top of the processing etc..

     

    Once you have the amplifier up and running, you can take a copy of the signal from the input stage to be able to send it to the DSP. How are you going to do this without disrupting the signal going to the amp? its possible that you can run the signal into the DSP and then back out to the amp but this would likely be more complex. Running the DSP with a copy of the signal/ as a parallel process would allow you to still use the basic system while you are working on it.

     

    There will likely be some lag between how fast the DSP can perform the FFT and use the results in a visual display when compared to the sound that comes out of the speakers, this is inevitable and this is why the faster the DSP is and the more efficiently you can get it to perform is paramount.

     

    Next is the display, can the DSP handle the display also? or would a separate controller be needed to send the output of the DSP to?

     

    Sorry I haven't offered any specific help at this stage but it is a large project with a lot of other complexities that could make any suggestions difficult without knowing more exact details. The synopsis of this is to Keep It Simple from the beginning and slowly work upwards, unexpected obstacles can and will arise.

     

    EDIT

    ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

    A quick side note on the power supply, driving 2 x 60W speakers at 12V = minimum power supply requirement of 12V at 10A without any other considerations is going to require something pretty beefy. In power supply language Beefy = Expensive

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