[AudioI] Microphone preamplifier

[Matt Flax]

Good to hear. The microphone preamplifier has been started - however there are a couple of other preamplifiers in line as well.
 

 

I am keen to get ideas on different use cases for this card. For example, I would imagine that people would want the phantom feature. But what about dynamic microphones ?

 

Matt
 

 
On 9/2/22 21:21, Ivan via People wrote:
 
 
 
Hi Matt,  

 
 
I would be very interested in the mic preamp if you were to design one, as I don't have the expertise... 
 

 
 
Is such a product on your roadmap? If so, how long do you expect it would take you to be able to offer it? 
 

 
 
Regards,
 
Ivan
 
 
 
 
On Tue, Feb 8, 2022 at 9:46 PM Matt Flax <matt at audioinjector.net <mailto:matt at audioinjector.net> > wrote:
 
 Hi there,
 
 The XLR preamplifier is setup to carry up to around 20.4 V (about 19.4 
 dBu). The output preamplifier has a gain of 13 dB. The input 
 preamplifier has a gain of -12.8 dB.
 
 A good microphone preamplifier would require both phantom power (the 

 power rail is available on the Pro and Isolated soundcards) and also a 
 significant input gain of around 30 dB.
 
 It would be great if enough people were interested in this to either 

 design their own together, or given more time I can design one up.
 
 Matt
 
 On 4/2/22 21:24, Ivan via People wrote:
 > Hello,
 >
 > I have a need to connect professional (condenser) microphones to the 
 > Raspberry Pi and I was wondering if I can use the XLR preamplifier 

 > with the Pro sound card, to do that?
 >
 > I've noticed that the sound card has the phantom power available, but 
 > I'm not sure if the XLR preamplifier has access to that and whether 
 > the gain is sufficient?
 >
 >
 > Thanks,
 > Ivan
 >
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