Can't get audio frequency at phone

Audio and Graphics
#1

Hello,

I am trying to get frequency of sound from outside, but I can’t get it on my android phone.

The code is as below:

function Timer500msListener() freq = recording:getTunerFrequency() title.text = freq print(freq) timer1sec = timer.performWithDelay(500, Timer500msListener) end recording = media.newRecording() recording:startTuner() recording:startRecording() timer1sec = timer.performWithDelay(500, Timer500msListener)

What may be the problem?

#2

Sorry, okay, there is no problem with the code at the moment now.

I am testing the frequency I get, and I compared it with a guitar tuner app.

I tested the E string at guitar, with my code I get around 450 Hz, but when I

test it with a guitar tuner program, I get around 88 Hz, that is the correct one

actually.

What is the reason of this difference? Does anybody have any idea?

Thanks.

#3

No idea?

#4

I found a audio frequency generator and I generated 440 Hz sound, and I measured it with my code I get around 2440 Hz.

I also tried to measure it with the corona sdk example Simple Tuner, and I again get 2440 Hz. But when I measure it with a tuner app I get the correct 440 Hz. value.

Is there anybody who has an idea about this issue?

#5

Let me ask an engineer. 

#6

What we discovered is, the frequency we measure is about 5.5454 times the real frequency.

#7

did you ask?

#8

They have been pretty busy getting the public release out, let me ask again.

#9

There are issues with the frequency input on devices. We are looking into improving this in the future. We don’t have a time table for the fix.

#10

I have a question about this. Using the OPs example using

recording = media.newRecording()

recording:getTunerFrequency() works(I can see the freq change).

But using 

local dateTime = os.time(t ) newAudio = tostring(dateTime) local filePath = system.pathForFile( newAudio, system.DocumentsDirectory ) recording = media.newRecording( filePath )

recording:getTunerFrequency() doesn’t seem to work? The freq never changes from 0.0. This shouldn’t happen correct? My expectation is for the recording:getTunerFrequency() to work like in the OPs example.

#11

Sorry, okay, there is no problem with the code at the moment now.

I am testing the frequency I get, and I compared it with a guitar tuner app.

I tested the E string at guitar, with my code I get around 450 Hz, but when I

test it with a guitar tuner program, I get around 88 Hz, that is the correct one

actually.

What is the reason of this difference? Does anybody have any idea?

Thanks.

#12

No idea?

#13

I found a audio frequency generator and I generated 440 Hz sound, and I measured it with my code I get around 2440 Hz.

I also tried to measure it with the corona sdk example Simple Tuner, and I again get 2440 Hz. But when I measure it with a tuner app I get the correct 440 Hz. value.

Is there anybody who has an idea about this issue?

#14

Let me ask an engineer. 

#15

What we discovered is, the frequency we measure is about 5.5454 times the real frequency.

#16

did you ask?

#17

They have been pretty busy getting the public release out, let me ask again.

#18

There are issues with the frequency input on devices. We are looking into improving this in the future. We don’t have a time table for the fix.

#19

I have a question about this. Using the OPs example using

recording = media.newRecording()

recording:getTunerFrequency() works(I can see the freq change).

But using 

local dateTime = os.time(t ) newAudio = tostring(dateTime) local filePath = system.pathForFile( newAudio, system.DocumentsDirectory ) recording = media.newRecording( filePath )

recording:getTunerFrequency() doesn’t seem to work? The freq never changes from 0.0. This shouldn’t happen correct? My expectation is for the recording:getTunerFrequency() to work like in the OPs example.