Connecting an External Audio Source to a DDS-100 Function Generator

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Discussion Overview

The discussion revolves around the possibility of connecting an external audio source, such as an mp3 player, to a DDS-100 Function Generator to output audio in a selected waveform. Participants explore the technical feasibility and potential methods for achieving this integration.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant inquires about the method to connect an mp3 player to the DDS-100 Function Generator.
  • Another participant notes that the DDS-100 may lack the capability to accept an external audio input, as it reportedly only has a power input.
  • A suggestion is made to mix both audio signals if direct connection is not possible.
  • One participant proposes the idea of using a modulator to combine the audio from the mp3 with the generator output, although they caution that the result may not be aesthetically pleasing unless done carefully.
  • There is a mention of using MIDI processors to extract melodies from mp3 files, which could then be programmed into the signal generator, although this would require a different unit than the one linked.
  • A software-based approach is suggested as an alternative, particularly for those with capable PCs, to achieve similar functions with more flexibility.

Areas of Agreement / Disagreement

Participants express uncertainty about the capabilities of the DDS-100 Function Generator, with some agreeing that it lacks an input for audio signals, while others propose alternative methods for achieving the desired outcome. The discussion remains unresolved regarding the best approach to connect an external audio source.

Contextual Notes

Participants note limitations regarding the DDS-100's specifications and the need for additional equipment or software to achieve the desired functionality. There is also a mention of potential aesthetic concerns with the output when using modulation techniques.

Sveral
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Hello,
I wanted to know, if it`s possible and how it to go about connecting an external audio source, for example, an mp3 player to the circuit of a DDS-100 Function generator, so that it outputs the audio from the mp3 in the selected wave form?

http://www.ebay.co.uk/itm/DDS-Function-Signal-Generator-Module-Sine-Square-Sawtooth-Triangle-Wave0-5-14Vpp-/182127176882?hash=item2a67a02cb2:g:D9IAAOSwvU5XMwDJ
Thanks.
 
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There may be some, but according to the online description this doesn't have that capability. For instance there is no connection for an input signal, only power input.
 
Tom.G said:
There may be some, but according to the online description this doesn't have that capability. For instance there is no connection for an input signal, only power input.
So the way to go about this would be to mix both of the audio signals or something?
 
I am not sure, exactly what you want but it sounds to me that you could be after a modulator which would modulate the programme material onto your generator output. That would give a possibly hideous output unless it's tastefully done. Or did you want to be able to transcribe the 'tune' of the MP3 file and programme the output of your signal generator. I believe there are midi processors that can dig out the melody of a recorded tune and produce a one- note version in midi code. That code could then be used to programme a suitable generator frequency and amplitude. But, as has been pointed out, the unit in your link has no electronic input for achieving this. If you really keen on this sort of thing then you would need to do a lot of homework, trawling around for a suitable unit (not as cheap as £13, I would think).
Otoh, you could go down the software route, if your PC is new and fast enough, to achieve the functions I have described. Doing it that way would ensure a certain amount of future proofing for your investment. There is a big scene in electronic music and loads of enthusiasts and 'experts' post their ideas on the Web.
 

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