RTOS/TMDSOSKL137: How to get the Waveform data from Mic in or Line in??

SONMOOK OH

Intellectual 260 points

Part Number: TMDSOSKL137
Other Parts Discussed in Thread: OMAP-L137

Tool/software: TI-RTOS

Hello,

My evm is TMDSOSKL137, I'm using Processor SDK RTOS 05_02_00_10

and I 'm testing pdk example

C:\ti\pdk_omapl137_1_0_7\packages\MyExampleProjects\MCASP_Audio_evmOMAPL137_c674xExampleProject

I just want to get the Waveform data from Mic in or Line in.. such as

Any suggestion is really thank you...

over 5 years ago

0 Michail Georgiev over 5 years ago

TI__Intellectual 2300 points

Hello,
I am in process of recreating your case on my side and have a question about peripherals connected for this example and it is:
Do you use 3.5mm jacks for input signal (line/mic) or you have connected the CMB (Circular Mic board) with 8 mics on it to the OMAP-L137 throug extension board?
www.spectrumdigital.com/.../
www.ti.com/.../TIDA-01454

Regards,
Michail

0 SONMOOK OH over 5 years ago in reply to Michail Georgiev

Intellectual 260 points

I'm using 3.5mm jacks for input signal (line and mic) . TMDSOSKL137

0 Michail Georgiev over 5 years ago in reply to SONMOOK OH

TI__Intellectual 2300 points

Hi,
in this case the signal you're sending to the board is pure analog audible signal which you can easily record with an application such as Audacity. It has many options to adjust recording settings and get waveforms in reasonable shape.

0 SONMOOK OH over 5 years ago in reply to Michail Georgiev

Intellectual 260 points

Yeah...You are right...

But I have to Real-time digital processing(Online)....

0 Michail Georgiev over 5 years ago in reply to SONMOOK OH

TI__Intellectual 2300 points

So you need the data before digital processing just to be visualized in real time and not to be recorded to a file (for example).
Is that correct?

0 SONMOOK OH over 5 years ago in reply to Michail Georgiev

Intellectual 260 points

Yeah!!:) correct!! I want to visualize thr data.

Regards,

Michail Georgiev said:
So you need the data before digital processing just to be visualized in real time and not to be recorded to a file (for example).
Is that correct?

0 Michail Georgiev over 5 years ago in reply to SONMOOK OH

TI__Intellectual 2300 points

For demonstration purposes the easiest way to display audio waveform without adding special hardware is to use the integrated sound card of an ordinary PC. Just put your signal to both inputs (either line or mic) of the PC and L137 board at same time. On PC side you can use various programs for visualisation depending on OS you're using (Linux, Win, MacOS etc.)

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RTOS/TMDSOSKL137: How to get the Waveform data from Mic in or Line in??