26 Dec
2004
26 Dec
'04
6:30 p.m.
Hey all,
We are looking for some portable digital recording devices with the
following criteria:
- very small
- durable
- near $100 ($100-150)
- usb compatible
- linux + windows friendly
- mic-in with a reasonable signal-to-noise ratio
- descent quality recordings
- battery powered
We intend to distribute about 10 - 20 of these units to radio
journalists in Mali, whom will use these devices to collect material for
their programs which they can then edit in Audacity and broadcast on the
air.
We are looking at devices such as the iRiver 190T
Any one have any experience with such devices, in particular using them
with linux?
Ian
On Sun, 2004-12-26 at 12:06 -0500,
linux-audio-dev-request(a)music.columbia.edu wrote:
Send linux-audio-dev mailing list submissions to
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Today's Topics:
1. Re: Tascam US428 Continued hangups (Spencer Russell)
----------------------------------------------------------------------
Message: 1
Date: Sun, 26 Dec 2004 02:09:21 -0800
From: Spencer Russell <Spencer.Russell(a)oberlin.edu>
Subject: Re: [linux-audio-dev] Tascam US428 Continued hangups
To: linux-audio-dev(a)music.columbia.edu
Message-ID: <20041226100921.GA12396@slingshot>
Content-Type: text/plain; charset=us-ascii
On Fri, Dec 24, 2004 at 12:05:07PM -0500, Rui Nuno Capela wrote:
--
Ian Howard
IESC/Geekcorps Mali "les volontaires de l'informatique"
coordinateur de programme
--------------------------------------------------
geekcorps (http://maligeekcorps.org)
ihoward(a)geekcorps.org
bureau/office: +223 221 49 43
mobile: +223 640 30 40
Porte 1085, Rue 240, Bamako, Mali
...
device. It was probably this very one that was aunting you before. After
some attention and furious alsa-bugtracker exchange, Karten Wiese has been
able to solve this, even tought he's got no OHCI hardware near him.
I was watching that thread a little, because my symptoms were
very similar. Strangely, though, I have a UHCI based card, so I'm
not sure why I was seeing similar symtoms.
Then Karsten did it again. He crafted a special
jackd alsa/usx2y backend
which enabled the so-called raw-usb mode of operation. And it was just
yesterday I have proposed the merge into the official alsa backend driver
on the jackit-devel list. With this new experimental stuff, one can run
jackd in realtime with pretty lowest-latency parameters, without aural
artifacts (i.e. crackling). AFAICT this is a greatest breakthrough on the
USB audio arena, so I would think twice about getting rid of your US428 ;)
I'm having a bit of trouble with the usx2y backend to jackd. I
bastardized the jackd-us2xy rpm to make a nice deb file, but
jackd still says "unknown driver 'usx2y'". Even downloading and
compiling the source, and running it directly from the directory
it ws compiled into. And does it automatically use the rawusb
interface? What's the advantage of using the usx2y driver as
opposed to the alsa driver?
So my recipe goes like this:
1. Have REALTIME_PREEMPT on the kernel config.
2. Make sure you have loaded the latest snd-usb-usx2y>=0.8.7.1 (as of
latest alsa-kernel cvs).
3. Tune the RT priorities (SCHED_FIFO) of the time-audio critical IRQ
threads:
90 - timer (IRQ 0)
80 - rtc (IRQ 8)
70 - snd (or whatever your PCI soundcard will hook, usually IRQ 5)
60 - usb (ohci_hcd or uhici_hcd, usually IRQ 10)
You should have schedutils installed (chrt) for this exercise.
4. Load the snd-usb-usx2y with the nrpacks parameter set for:
a. high-stability: nrpacks=4
b. low-latency: nrpacks=1
Anyway, be advised that you can only run the forementioned "rawusb"
mode if you set on this later one (modprobe snd-usb-usx2y nrpacks=1).
Run your jackd command line (or qjackctl;) as usual, but given the above
priority tunning, you should try e.g. jackd -R -P60 ...
Thanks a lot for this detailed info! I recompiled the newest
snd-usb-usx2y driver, but how do I tune RT priorities? I got the
schedutils package, but I'm having trouble finding details on how
to use chrt.
Thanks again for the info.
-spencer
------------------------------
_______________________________________________
linux-audio-dev mailing list
linux-audio-dev(a)music.columbia.edu
http://music.columbia.edu/mailman/listinfo/linux-audio-dev
End of linux-audio-dev Digest, Vol 15, Issue 46
*********************************************** 
27 Dec
27 Dec
6:10 p.m.
New subject: [linux-audio-dev] Linux friendly, portable digital recording devices?
Neuros is very nice but a bit more expensive depending on how much
storage you need. It will record in mp3 or wav (up to 15/48KHz).
Jan
On Sun, 2004-12-26 at 16:19, Ian Howard wrote:
Hey all,
We are looking for some portable digital recording devices with the
following criteria:
- very small
- durable
- near $100 ($100-150)
- usb compatible
- linux + windows friendly
- mic-in with a reasonable signal-to-noise ratio
- descent quality recordings
- battery powered
We intend to distribute about 10 - 20 of these units to radio
journalists in Mali, whom will use these devices to collect material for
their programs which they can then edit in Audacity and broadcast on the
air.
We are looking at devices such as the iRiver 190T
Any one have any experience with such devices, in particular using them
with linux?
Ian
On Sun, 2004-12-26 at 12:06 -0500,
linux-audio-dev-request(a)music.columbia.edu wrote:
> Send linux-audio-dev mailing list submissions to
> linux-audio-dev(a)music.columbia.edu
>
> To subscribe or unsubscribe via the World Wide Web, visit
> http://music.columbia.edu/mailman/listinfo/linux-audio-dev
> or, via email, send a message with subject or body 'help' to
> linux-audio-dev-request(a)music.columbia.edu
>
> You can reach the person managing the list at
> linux-audio-dev-owner(a)music.columbia.edu
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of linux-audio-dev digest..."
>
>
> Today's Topics:
>
> 1. Re: Tascam US428 Continued hangups (Spencer Russell)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sun, 26 Dec 2004 02:09:21 -0800
> From: Spencer Russell <Spencer.Russell(a)oberlin.edu>
> Subject: Re: [linux-audio-dev] Tascam US428 Continued hangups
> To: linux-audio-dev(a)music.columbia.edu
> Message-ID: <20041226100921.GA12396@slingshot>
> Content-Type: text/plain; charset=us-ascii
>
> On Fri, Dec 24, 2004 at 12:05:07PM -0500, Rui Nuno Capela wrote:
> >
> > ...
> > device. It was probably this very one that was aunting you before. After
> > some attention and furious alsa-bugtracker exchange, Karten Wiese has been
> > able to solve this, even tought he's got no OHCI hardware near him.
> >
>
> I was watching that thread a little, because my symptoms were
> very similar. Strangely, though, I have a UHCI based card, so I'm
> not sure why I was seeing similar symtoms.
>
> > Then Karsten did it again. He crafted a special jackd alsa/usx2y backend
> > which enabled the so-called raw-usb mode of operation. And it was just
> > yesterday I have proposed the merge into the official alsa backend driver
> > on the jackit-devel list. With this new experimental stuff, one can run
> > jackd in realtime with pretty lowest-latency parameters, without aural
> > artifacts (i.e. crackling). AFAICT this is a greatest breakthrough on the
> > USB audio arena, so I would think twice about getting rid of your US428 ;)
> >
>
> I'm having a bit of trouble with the usx2y backend to jackd. I
> bastardized the jackd-us2xy rpm to make a nice deb file, but
> jackd still says "unknown driver 'usx2y'". Even downloading and
> compiling the source, and running it directly from the directory
> it ws compiled into. And does it automatically use the rawusb
> interface? What's the advantage of using the usx2y driver as
> opposed to the alsa driver?
>
> > So my recipe goes like this:
> >
> > 1. Have REALTIME_PREEMPT on the kernel config.
> >
> > 2. Make sure you have loaded the latest snd-usb-usx2y>=0.8.7.1 (as of
> > latest alsa-kernel cvs).
> >
> > 3. Tune the RT priorities (SCHED_FIFO) of the time-audio critical IRQ
> > threads:
> > 90 - timer (IRQ 0)
> > 80 - rtc (IRQ 8)
> > 70 - snd (or whatever your PCI soundcard will hook, usually IRQ 5)
> > 60 - usb (ohci_hcd or uhici_hcd, usually IRQ 10)
> > You should have schedutils installed (chrt) for this exercise.
> >
> > 4. Load the snd-usb-usx2y with the nrpacks parameter set for:
> > a. high-stability: nrpacks=4
> > b. low-latency: nrpacks=1
> > Anyway, be advised that you can only run the forementioned
"rawusb"
> > mode if you set on this later one (modprobe snd-usb-usx2y nrpacks=1).
> >
> > Run your jackd command line (or qjackctl;) as usual, but given the above
> > priority tunning, you should try e.g. jackd -R -P60 ...
> >
> Thanks a lot for this detailed info! I recompiled the newest
> snd-usb-usx2y driver, but how do I tune RT priorities? I got the
> schedutils package, but I'm having trouble finding details on how
> to use chrt.
>
> Thanks again for the info.
> -spencer
>
>
> ------------------------------
>
> _______________________________________________
> linux-audio-dev mailing list
> linux-audio-dev(a)music.columbia.edu
> http://music.columbia.edu/mailman/listinfo/linux-audio-dev
>
>
> End of linux-audio-dev Digest, Vol 15, Issue 46
> ***********************************************
2 Jan
2 Jan
12:36 p.m.
New subject: [linux-audio-dev] Linux friendly, portable digital recording devices?
i recall that len moskowitz was working on an ipaq-based recorder. i
guess the web site is http://www.core-sound.com/.
it's probably out of your price range, though.
Ian Howard wrote:
Hey all,
We are looking for some portable digital recording devices with the
following criteria:
- very small
- durable
- near $100 ($100-150)
- usb compatible
- linux + windows friendly
- mic-in with a reasonable signal-to-noise ratio
- descent quality recordings
- battery powered
We intend to distribute about 10 - 20 of these units to radio
journalists in Mali, whom will use these devices to collect material for
their programs which they can then edit in Audacity and broadcast on the
air.
We are looking at devices such as the iRiver 190T
Any one have any experience with such devices, in particular using them
with linux?
Ian
On Sun, 2004-12-26 at 12:06 -0500,
linux-audio-dev-request(a)music.columbia.edu wrote:
>Send linux-audio-dev mailing list submissions to
> linux-audio-dev(a)music.columbia.edu
>
>To subscribe or unsubscribe via the World Wide Web, visit
> http://music.columbia.edu/mailman/listinfo/linux-audio-dev
>or, via email, send a message with subject or body 'help' to
> linux-audio-dev-request(a)music.columbia.edu
>
>You can reach the person managing the list at
> linux-audio-dev-owner(a)music.columbia.edu
>
>When replying, please edit your Subject line so it is more specific
>than "Re: Contents of linux-audio-dev digest..."
>
>
>Today's Topics:
>
> 1. Re: Tascam US428 Continued hangups (Spencer Russell)
>
>
>----------------------------------------------------------------------
>
>Message: 1
>Date: Sun, 26 Dec 2004 02:09:21 -0800
>From: Spencer Russell <Spencer.Russell(a)oberlin.edu>
>Subject: Re: [linux-audio-dev] Tascam US428 Continued hangups
>To: linux-audio-dev(a)music.columbia.edu
>Message-ID: <20041226100921.GA12396@slingshot>
>Content-Type: text/plain; charset=us-ascii
>
>On Fri, Dec 24, 2004 at 12:05:07PM -0500, Rui Nuno Capela wrote:
>
>>...
>>device. It was probably this very one that was aunting you before. After
>>some attention and furious alsa-bugtracker exchange, Karten Wiese has been
>>able to solve this, even tought he's got no OHCI hardware near him.
>>
>
>I was watching that thread a little, because my symptoms were
>very similar. Strangely, though, I have a UHCI based card, so I'm
>not sure why I was seeing similar symtoms.
>
>
>>Then Karsten did it again. He crafted a special jackd alsa/usx2y backend
>>which enabled the so-called raw-usb mode of operation. And it was just
>>yesterday I have proposed the merge into the official alsa backend driver
>>on the jackit-devel list. With this new experimental stuff, one can run
>>jackd in realtime with pretty lowest-latency parameters, without aural
>>artifacts (i.e. crackling). AFAICT this is a greatest breakthrough on the
>>USB audio arena, so I would think twice about getting rid of your US428 ;)
>>
>
>I'm having a bit of trouble with the usx2y backend to jackd. I
>bastardized the jackd-us2xy rpm to make a nice deb file, but
>jackd still says "unknown driver 'usx2y'". Even downloading and
>compiling the source, and running it directly from the directory
>it ws compiled into. And does it automatically use the rawusb
>interface? What's the advantage of using the usx2y driver as
>opposed to the alsa driver?
>
>
>>So my recipe goes like this:
>>
>>1. Have REALTIME_PREEMPT on the kernel config.
>>
>>2. Make sure you have loaded the latest snd-usb-usx2y>=0.8.7.1 (as of
>> latest alsa-kernel cvs).
>>
>>3. Tune the RT priorities (SCHED_FIFO) of the time-audio critical IRQ
>> threads:
>> 90 - timer (IRQ 0)
>> 80 - rtc (IRQ 8)
>> 70 - snd (or whatever your PCI soundcard will hook, usually IRQ 5)
>> 60 - usb (ohci_hcd or uhici_hcd, usually IRQ 10)
>> You should have schedutils installed (chrt) for this exercise.
>>
>>4. Load the snd-usb-usx2y with the nrpacks parameter set for:
>> a. high-stability: nrpacks=4
>> b. low-latency: nrpacks=1
>> Anyway, be advised that you can only run the forementioned "rawusb"
>> mode if you set on this later one (modprobe snd-usb-usx2y nrpacks=1).
>>
>>Run your jackd command line (or qjackctl;) as usual, but given the above
>>priority tunning, you should try e.g. jackd -R -P60 ...
>>
>
>Thanks a lot for this detailed info! I recompiled the newest
>snd-usb-usx2y driver, but how do I tune RT priorities? I got the
>schedutils package, but I'm having trouble finding details on how
>to use chrt.
>
>Thanks again for the info.
>-spencer
>
>
>------------------------------
>
>_______________________________________________
>linux-audio-dev mailing list
>linux-audio-dev(a)music.columbia.edu
>http://music.columbia.edu/mailman/listinfo/linux-audio-dev
>
>
>End of linux-audio-dev Digest, Vol 15, Issue 46
>***********************************************
1:23 p.m.
New subject: [linux-audio-dev] Linux friendly, portable digital recording devices?
I think the Neuros II (http://www.neurosaudio.com/) is closer to what
you need. It includes a built in microphone as well as a mic in.
Records in mp3 or WAV (up o 48KHz). USB 2.0 interface. Mine works very
well with Linux. You can get one with 256MB of memory for $140 or one
with a 20GB hard drive for $250. They run for quite a while on
batteries. When recording on batteries they will last longer using mp3
recording than WAV recording. Batteries are rechargeable. One of the
nice things about this company is that they have open sourced all of
their software and opened the specs for the units. They actually want
open source developers on-board (go figure). Their support is excellent
as well (the first one I received had been bounced around a bit in
shipping and they sent me a new one immediately).
Jan
On Sun, 2005-01-02 at 10:35, Joern Nettingsmeier wrote:
i recall that len moskowitz was working on an
ipaq-based recorder. i
guess the web site is http://www.core-sound.com/.
it's probably out of your price range, though.
Ian Howard wrote:
> Hey all,
>
> We are looking for some portable digital recording devices with the
> following criteria:
>
> - very small
> - durable
> - near $100 ($100-150)
> - usb compatible
> - linux + windows friendly
> - mic-in with a reasonable signal-to-noise ratio
> - descent quality recordings
> - battery powered
>
> We intend to distribute about 10 - 20 of these units to radio
> journalists in Mali, whom will use these devices to collect material for
> their programs which they can then edit in Audacity and broadcast on the
> air.
>
> We are looking at devices such as the iRiver 190T
>
> Any one have any experience with such devices, in particular using them
> with linux?
>
> Ian
>
3 Jan
3 Jan
1:50 p.m.
New subject: [linux-audio-dev] Linux friendly, portable digital recording devices?
On Sunday 02 January 2005 18.53, Jan Depner wrote:
[...]
When recording on batteries they will
last longer using mp3 recording than WAV recording.
Weird. :-) Disk/flash I/O uses more power than mp3 encoding...?
One of the nice things about this company is that
they have open sourced all of their software and opened the specs
for the units. They actually want open source developers on-board
(go figure).
Kewl. One should almost get one just for political reasons. ;-)
(But I could use one anyway, for recording those interesting sounds
that are too far from my computer to be recorded directly.)
//David Olofson - Programmer, Composer, Open Source Advocate
.- Audiality -----------------------------------------------.
| Free/Open Source audio engine for games and multimedia. |
| MIDI, modular synthesis, real time effects, scripting,... |
`-----------------------------------> http://audiality.org -'
--- http://olofson.net --- http://www.reologica.se ---
2:43 p.m.
New subject: [linux-audio-dev] Linux friendly, portable digital recording devices?
On Mon, 2005-01-03 at 11:50, David Olofson wrote:
Also the fact that it supports OGG and FLAC.
On Sunday 02 January 2005 18.53, Jan Depner wrote:
[...]
Only with the disk. It has to keep spinning it up.
When recording on batteries they will
last longer using mp3 recording than WAV recording.
Weird. :-) Disk/flash I/O uses more power than mp3 encoding...?
One of the nice things about this company is
that
they have open sourced all of their software and opened the specs
for the units. They actually want open source developers on-board
(go figure).
Kewl. One should almost get one just for political reasons. ;-)
(But I could use one anyway, for recording those
interesting sounds
that are too far from my computer to be recorded directly.)
That's one of the main reasons I got one. I've got a little
Behringer MX602A to go with it for recording gigs. I used to use a huge
SONY PCM with a VCR and the mixer. It also will record in 48KHz instead
of 44.1KHz.
Jan
7293
days inactive
7301
days old
linux-audio-dev@lists.linuxaudio.org
5 comments
4 participants
participants (4)
-
David Olofson -
Ian Howard -
Jan Depner -
Joern Nettingsmeier