Harktool4 closing abruptly

[Rohan sheelvant]

I am using Harktool4 for generating a transfer function for a 4 mic circular array.

In Harktool4 software the Mic array option, I choose a distance of 0.50m, elevation-16.70, and as I am using a mic array of 4 mics, I set the azimuth to be 0 – 270 at Interval of 90.

The mic array that I am using gives a 6 channel output out of which only 4 are actually relevant as they contain the audio data of 4 mics. Therefore in the channel list, I entered channels: 1,2,3,4 (these are the channels I need). On clicking create, there is no error shown but if I click Plot then the harktool4 software will close automatically giving an error in terminal(mentioned below).

ERROR:

terminate called after throwing an instance of ‘std::range_error’
what(): length of given vector is zero
Aborted (core dumped)

I am attaching screenshots for your reference. Can you please let me know if I have made any mistake in entering the parameters.

PS: If I select the channels as 0,1,2,3 then the software works fine and I am able to generate the transfer function.

Attachments:

1. 

   Screenshot-from-2019-05-31-16-28-00.png
   

[Rohan sheelvant]

Attached is the screenshot of the terminal error.

Attachments:

1. 

   Screenshot-from-2019-05-31-16-27-32-min.png
   

[nterakado]

Hello,
Thank you for your inquiry.

When creating a transfer function, microphone array configuration starts from 0.
So selecting the channels as 0,1,2,3 is correct.
This will use the four-channel stream created from channels 1, 2, 3, and 4.

Best Regards.

[Rohan sheelvant]

Yes， I understand that if I select 0,1,2,3 then channels 1,2,3,4 will be used.

But I want to use 2nd, 3rd, 4th and 5th channel of the 6 available channels.

So, how do I proceed?

[nterakado]

There are 2 cases in creating transfer function depending on your setup.

Case1: Geometric transfer function
The position and the number of microphones that actually exists must be set in the HARKTOOL’s channel list. Since ReSpeaker Mic Array only has 4 microphones, it will create a 4-channel transfer function.

Case2: TSP transfer function.
The number of microphones used must be set in HARKTOOL’s channel list. But since the TSP sound recorded by ReSpeaker Mic Array has 6 channels, the WAV files input to HARKTOOL must exclude 0 and 5 channels beforehand. To do this, for example if you use a tool called ‘sox’, this can be done by executing the following command:

sox input.wav output.wav remix 2 3 4 5

Note that the channel number starts with 1 in sox, while in HARK it starts with 0.

In HARK, the 6 channels of data coming from AudioStreamFromMic can be filtered by using the ChannelSelector node in configuring the channels needed.

https://www.hark.jp/document/hark-document-en/subsec-ChannelSelector.html

In your case, if you want to use the 2nd, 3rd, 4th, and 5th channels, you can set <Vector<int> 1 2 3 4> in the ChannelSelector’s SELECTOR parameter.

• This reply was modified 5 years, 5 months ago by nterakado.
• This reply was modified 5 years, 5 months ago by nterakado.

[Rohan sheelvant]

Yes, this method will solve my problem.

Thank you for your reply 🙂

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