Hi All, Newbie at Audio, I am so desperate

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Ghild

Ghild

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Joined 2013
#1
Hi All,

I have new job , my first job's project is about audio.
Just simple mic preamps, I got problem with Impedance, record from Audacity is good, with some samsung smartphone also good, but with my phone is not good (Lenovo smartphone - Vibe k5 plus). Record result distorted , I have tried tweaking a resistor circuit to match the impedance but I only get distorted or low Amplification with high noise.

Hope find someone or something here to solve my problem.
Greetings all 🙂
 
#4
Can you tell us more about the use-case and what your goal is? Knowing which model pone(s) would also be helpful. iOS and Android support external audio cards (iOS with the Camera Connection Kit, android with various adapters, USB-OTG [on the go] being one way).

There are ready-made solutions for this if you're just attempting to record higher quality audio with a smartphone: IK Multimedia | iRig Mic - Handheld microphone for iPhone, iPad, iPod touch, and Android devices or see https://www.gearank.com/guides/ipad-audio-interface . iOS + CCK should work with most audio interfaces, but watch power consumption or go for the powered CCK USB3 adapter which should run interfaces with slightly higher power demands just fine.

For android, Android Audio Recording - How to record high-quality audio to your Android phone or tablet for podcasting or music production appears to have some good advice, but it's a bit old now (3 years is many in smartphone years). I would assume that it's even easier and more well-supported these days.
 
#8
DF96 said:
I am not an expert on smart phones or microphones, but I would suspect that a mic input is intended to take a mic without a preamp?
Click to expand...

I am not really understand your question, sorry for my bad english.

I want try record a very small sound with microphone (electret) using smartphone, so I need preamp to amplify that signal, and also put filter there.
 
#12
seanp2k said:
Can you tell us more about the use-case and what your goal is? Knowing which model pone(s) would also be helpful. iOS and Android support external audio cards (iOS with the Camera Connection Kit, android with various adapters, USB-OTG [on the go] being one way).

There are ready-made solutions for this if you're just attempting to record higher quality audio with a smartphone: IK Multimedia | iRig Mic - Handheld microphone for iPhone, iPad, iPod touch, and Android devices or see https://www.gearank.com/guides/ipad-audio-interface . iOS + CCK should work with most audio interfaces, but watch power consumption or go for the powered CCK USB3 adapter which should run interfaces with slightly higher power demands just fine.

For android, Android Audio Recording - How to record high-quality audio to your Android phone or tablet for podcasting or music production appears to have some good advice, but it's a bit old now (3 years is many in smartphone years). I would assume that it's even easier and more well-supported these days.
Click to expand...

I want to amplify certain frequency of small sound and record it to my smartphone.

yes I am want learn to build something like this Digigram Qmic I am so curious with this product because "no need battery" , I think it powered by smartphone's bias voltage at Mic Input, but how they do that ? that Mic Input line use for power and signal input ?

But, dont worry, I want build device with battery (3V).
The record is good at Xioami Note 4 and some Samsung smartphone.
but when using Lenovo Vibe K5 plus, the record distorted.

My goal is :
Amplify signal with high SNR and Can fit with smartphone mic input
 
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