December 2015 - WLUG - wlug.mailman3.com

Re: [Wlug] Audio processing question
by Andy Stewart 26 Dec '15

26 Dec '15

On 12/26/2015 04:13 PM, Steve Revilak wrote: >> Hi gang, >> >> I think I need something like the Virtual audio cable, but I'd like to >> know if there are other possibilities. >> >> I have two audio programs that I want to talk to each other: gqrx and >> Dream. > [..] > > > Jack might be worth a try. http://www.jackaudio.org/ > > Steve Thanks, Steve, I'm looking at it but I'm not finding usage examples that tie together two programs. I'll keep looking. Andy -- Andy Stewart (KB1OIQ) Founder: Worcester Linux Users' Group Founder: Chelmsford Linux Meetup Group President: PART of Westford, MA (WB1GOF)

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Re: [Wlug] Audio processing question
by Andy Stewart 26 Dec '15

26 Dec '15

On 12/26/2015 05:10 PM, John Stoffel wrote: >>>>>> "Andy" == Andy Stewart <andystewart(a)comcast.net> writes: > > Andy> Hi gang, > > Andy> I think I need something like the Virtual audio cable, but I'd like to > Andy> know if there are other possibilities. > > Andy> I have two audio programs that I want to talk to each other: gqrx and > Andy> Dream. > > Andy> gqrx is a software defined radio receiver that can save its audio as a > Andy> WAV file, or it can stream audio via a UDP port. > > Andy> Dream is a digital radio mondiale (DRM) decoder. Digital radio mondiale > Andy> is a shortwave radio broadcast in a digital format. Dream can read a > Andy> WAV file, or it can read audio information from the microphone. It > Andy> outputs a rather nicely sounding radio broadcast (mono or stereo > Andy> depending on the broadcaster) with no static and no fading. > > Andy> I have succeeded in recording gqrx audio to a WAV file, and later having > Andy> Dream decode it. > > Andy> What I want to do is listen to the DRM broadcast in real time. I was > Andy> unsuccessful in getting Dream to read the WAV file while it was being > Andy> written. > > Andy> Does anybody have any suggestions as to how this could be done? > > Have you tried setting up a FIFO that each program opens and treats as > a WAV file? That might be the way to have them talk to each other. > >> mkfifo /var/tmp/radio >> gqrx --output /var/tmp/radio >> mondiale --input /var/tmp/radio > > though I havent' a clue what the two programs do at the commmand > level. Hi John, That is an interesting idea but gqrx doesn't let the user pick a file name for saving the WAV audio. It creates a file name by an internal algorithm. All I can do is pick the directory in which that file is saved. Is there a way that I can tie a file to a UDP port? gqrx will output an audio stream on a UDP port. If I can make that look like a file, perhaps "mondiale" will consume it. Andy -- Andy Stewart (KB1OIQ) Founder: Worcester Linux Users' Group Founder: Chelmsford Linux Meetup Group President: PART of Westford, MA (WB1GOF)

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Re: [Wlug] Audio processing question
by John Stoffel 26 Dec '15

26 Dec '15

>>>>> "Andy" == Andy Stewart <andystewart(a)comcast.net> writes: Andy> Hi gang, Andy> I think I need something like the Virtual audio cable, but I'd like to Andy> know if there are other possibilities. Andy> I have two audio programs that I want to talk to each other: gqrx and Andy> Dream. Andy> gqrx is a software defined radio receiver that can save its audio as a Andy> WAV file, or it can stream audio via a UDP port. Andy> Dream is a digital radio mondiale (DRM) decoder. Digital radio mondiale Andy> is a shortwave radio broadcast in a digital format. Dream can read a Andy> WAV file, or it can read audio information from the microphone. It Andy> outputs a rather nicely sounding radio broadcast (mono or stereo Andy> depending on the broadcaster) with no static and no fading. Andy> I have succeeded in recording gqrx audio to a WAV file, and later having Andy> Dream decode it. Andy> What I want to do is listen to the DRM broadcast in real time. I was Andy> unsuccessful in getting Dream to read the WAV file while it was being Andy> written. Andy> Does anybody have any suggestions as to how this could be done? Have you tried setting up a FIFO that each program opens and treats as a WAV file? That might be the way to have them talk to each other. > mkfifo /var/tmp/radio > gqrx --output /var/tmp/radio > mondiale --input /var/tmp/radio though I havent' a clue what the two programs do at the commmand level.

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Re: [Wlug] Audio processing question
by Steve Revilak 26 Dec '15

26 Dec '15

>Hi gang, > >I think I need something like the Virtual audio cable, but I'd like to >know if there are other possibilities. > >I have two audio programs that I want to talk to each other: gqrx and >Dream. [..] Jack might be worth a try. http://www.jackaudio.org/ Steve

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Audio processing question
by Andy Stewart 26 Dec '15

26 Dec '15

Hi gang, I think I need something like the Virtual audio cable, but I'd like to know if there are other possibilities. I have two audio programs that I want to talk to each other: gqrx and Dream. gqrx is a software defined radio receiver that can save its audio as a WAV file, or it can stream audio via a UDP port. Dream is a digital radio mondiale (DRM) decoder. Digital radio mondiale is a shortwave radio broadcast in a digital format. Dream can read a WAV file, or it can read audio information from the microphone. It outputs a rather nicely sounding radio broadcast (mono or stereo depending on the broadcaster) with no static and no fading. I have succeeded in recording gqrx audio to a WAV file, and later having Dream decode it. What I want to do is listen to the DRM broadcast in real time. I was unsuccessful in getting Dream to read the WAV file while it was being written. Does anybody have any suggestions as to how this could be done? FYI: reception of DRM broadcasts requires an upper sideband radio receiver that is at least 10kHz wide, a decent antenna, and in my case, a DVB-T dongle and the gqrx software coupled with Dream. Thanks in advance for any help you may provide. Andy -- Andy Stewart (KB1OIQ) Founder: Worcester Linux Users' Group Founder: Chelmsford Linux Meetup Group President: PART of Westford, MA (WB1GOF)

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Re: [Wlug] January WLUG topic... ELK / Graphite / Grafana?
by Higgins, Benjamin John 14 Dec '15

14 Dec '15

Ditto From: wlug-bounces(a)mail.wlug.org [mailto:wlug-bounces@mail.wlug.org] On Behalf Of Eric Martin Sent: Monday, December 14, 2015 11:05 AM To: Worcester Linux Users Group <wlug(a)mail.wlug.org> Subject: Re: [Wlug] January WLUG topic... ELK / Graphite / Grafana? I'm interested On Fri, Dec 11, 2015 at 1:20 PM, Tim Keller <turbofx(a)gmail.com<mailto:turbofx@gmail.com>> wrote: Talking to people last night it sounds like there's some serious interest in collecting / searching / displaying / dashboards. Since I've been working with this stuff, if people are interested I wouldn't mind giving a talk / demo, showing off elasticsearch, logstash, kalbana, graphite, grafana, etc. Are people interested? Thanks, Tim. -- I am leery of the allegiances of any politician who refers to their constituents as "consumers". _______________________________________________ Wlug mailing list Wlug(a)mail.wlug.org<mailto:Wlug@mail.wlug.org> http://mail.wlug.org/mailman/listinfo/wlug -- Eric Martin

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Re: [Wlug] January WLUG topic... ELK / Graphite / Grafana?
by Eric Martin 14 Dec '15

14 Dec '15

I'm interested On Fri, Dec 11, 2015 at 1:20 PM, Tim Keller <turbofx(a)gmail.com> wrote: > Talking to people last night it sounds like there's some serious interest > in collecting / searching / displaying / dashboards. > > Since I've been working with this stuff, if people are interested I > wouldn't mind giving a talk / demo, showing off elasticsearch, logstash, > kalbana, graphite, grafana, etc. > > Are people interested? > > Thanks, > Tim. > > -- > I am leery of the allegiances of any politician who refers to their > constituents as "consumers". > > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug > > -- Eric Martin

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January WLUG topic... ELK / Graphite / Grafana?
by Tim Keller 11 Dec '15

11 Dec '15

Talking to people last night it sounds like there's some serious interest in collecting / searching / displaying / dashboards. Since I've been working with this stuff, if people are interested I wouldn't mind giving a talk / demo, showing off elasticsearch, logstash, kalbana, graphite, grafana, etc. Are people interested? Thanks, Tim. -- I am leery of the allegiances of any politician who refers to their constituents as "consumers".

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Re: [Wlug] Don't forget! I didn't forget!!
by Tim Keller 11 Dec '15

11 Dec '15

Keith, Firstly, Sorry about the broken foot, that sucks! I hope your on the mend quick. Secondly, Chuck recorded the whole thing! So, while you convalesce you'll be able watch it on youtube or where we end up putting it. Thanks, Tim. On Thu, Dec 10, 2015 at 9:33 PM, Keith Wright <kwright(a)keithdiane.us> wrote: > Chuck Anderson <cra(a)WPI.EDU> writes: > > > We have a lot to cover, so we'll be starting right at 7! > > I really wanted to be there. Last Saturday (5 days ago) > I fell and twisted my ankle. It's been sore, but I limped > to the coffee shop yesterday, I figured I could limp to > the WLUG meeting. > > But first I had a 4pm routine doctor appointment, I showed > him my foot, he said you should get an X-ray. > > No problem, just to be sure, they can do it in an hour. > > The X-ray techniciane said: "I'm not a doctor, so I > can't tell you anything official, but you should go > to the emergency room. I'll send the X-rays there." > > So the bottom line is I got home about 9:30 with > a cast on my broken foot. I think I'll stay here. > > See you next time. > > -- Keith > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug > -- I am leery of the allegiances of any politician who refers to their constituents as "consumers".

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Re: [Wlug] Don't forget! I didn't forget!!
by Keith Wright 11 Dec '15

11 Dec '15

Chuck Anderson <cra(a)WPI.EDU> writes: > We have a lot to cover, so we'll be starting right at 7! I really wanted to be there. Last Saturday (5 days ago) I fell and twisted my ankle. It's been sore, but I limped to the coffee shop yesterday, I figured I could limp to the WLUG meeting. But first I had a 4pm routine doctor appointment, I showed him my foot, he said you should get an X-ray. No problem, just to be sure, they can do it in an hour. The X-ray techniciane said: "I'm not a doctor, so I can't tell you anything official, but you should go to the emergency room. I'll send the X-rays there." So the bottom line is I got home about 9:30 with a cast on my broken foot. I think I'll stay here. See you next time. -- Keith

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