ReSpeaker 4-Mic Linear Array

info about ReSpeaker series products

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dragon38
Pre-kindergarten
Pre-kindergarten
Posts: 1
Joined: Mon May 27, 2019 4:15 pm

ReSpeaker 4-Mic Linear Array

Post by dragon38 » Mon May 27, 2019 4:21 pm

Hello,
my team would like to create a smart intercom using raspberry.
I wanted to ask you if the product ReSpeaker 4-Mic Linear Array can:
1) be used with alsa drivers, as a default device
2) has already integrated the echo cancellation
3) the "JST 2.0 speaker jack" output is amplified
4) Which speaker is more correct to use in the output "JST 2.0 speaker jack", an 8 Ohm or a 50 Ohm?

bill.yu
Elementary-5
Elementary-5
Posts: 597
Joined: Mon Apr 02, 2018 11:05 am

Re: ReSpeaker 4-Mic Linear Array

Post by bill.yu » Wed Jun 05, 2019 5:19 pm

Hi there

please see below replies.

1) be used with alsa drivers, as a default device: Yes

2) has already integrated the echo cancellation: there are 2 playback channels, one is from jst2.0 and other is from 3.5mm audio port. you can refer to https://github.com/voice-engine/ec for AEC.

3) the "JST 2.0 speaker jack" output is amplified: yes, the amplifer is tpa6205a, you can refer to datasheet. http://www.ti.com/lit/ds/symlink/tpa6205a1.pdf

4) Which speaker is more correct to use in the output "JST 2.0 speaker jack", an 8 Ohm or a 50 Ohm? 8ohm.

thanks.

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