3 Mar
2015
3 Mar
'15
4:13 p.m.
I have been trying to strategize cutting the USB cord (right now, one USB, one
Firewire...) for my portable synth on and off for a long time; I really don't like
wearing out USB ports and cables !!!! Was just perusing some of the AoIP conversation and
thinking...and then a thought was given, did a search, and found:
https://www.hifiberry.com/
So, at least in theory, for about $160 or so, I could get one of those and an RPi 2.0
starter kit, run netjack and qmidinet, and have a 96kHz wifi audio interface with MIDI...?
Anyone see an obvious catch?
--
Jonathan E. Brickman | jeb(a)ponderworthy.com | (785)233-9977
Ponderworthy | http://ponderworthy.com
Music of compassion; fire, and life!!!
3 Mar
3 Mar
8:27 p.m.
* Jonathan E. Brickman <jeb(a)ponderworthy.com> [2015-03-03 16:13]:
I have been trying to strategize cutting the USB cord
(right now, one USB, one Firewire...) for my portable synth on and off for a long time; I
really don't like wearing out USB ports and cables !!!! Was just perusing some of the
AoIP conversation and thinking...and then a thought was given, did a search, and found:
https://www.hifiberry.com/
So, at least in theory, for about $160 or so, I could get one of those and an RPi 2.0
starter kit, run netjack and qmidinet, and have a 96kHz wifi audio interface with MIDI...?
Anyone see an obvious catch?
wifi
10:39 p.m.
On Tue, 3 Mar 2015 08:13:07 -0700 (MST)
"Jonathan E. Brickman" <jeb(a)ponderworthy.com> wrote:
I have been trying to strategize cutting the USB cord
(right now, one USB, one Firewire...) for my portable synth on and off for a long time; I
really don't like wearing out USB ports and cables !!!! Was just perusing some of the
AoIP conversation and thinking...and then a thought was given, did a search, and found:
https://www.hifiberry.com/
So, at least in theory, for about $160 or so, I could get one of those and an RPi 2.0
starter kit, run netjack and qmidinet, and have a 96kHz wifi audio interface with MIDI...?
Anyone see an obvious catch?
Sounds interesting. I've no experience of wifi. What's the reliability and
latency like?
--
Will J Godfrey
http://www.musically.me.uk
Say you have a poem and I have a tune.
Exchange them and we can both have a poem, a tune, and a song.
4 Mar
4 Mar
6:53 a.m.
On 03/03/2015 11:40 AM, Will Godfrey wrote:
On Tue, 3 Mar 2015 08:13:07 -0700 (MST) "Jonathan
E. Brickman"
<jeb(a)ponderworthy.com> wrote:
Don't know about yours, but our wifi here reports about 166ms latency
and 0.50% packet loss over the past month, using the FCC Speed Test app
for Android.
My wife wouldn't describe wifi of any sort as "reliable".
--
David W. Jones
gnome(a)hawaii.rr.com
authenticity, honesty, community
http://dancingtreefrog.com
I have been trying to strategize cutting the USB
cord (right now,
one USB, one Firewire...) for my portable synth on and off for a
long time; I really don't like wearing out USB ports and cables
!!!! Was just perusing some of the AoIP conversation and
thinking...and then a thought was given, did a search, and found:
https://www.hifiberry.com/
So, at least in theory, for about $160 or so, I could get one of
those and an RPi 2.0 starter kit, run netjack and qmidinet, and
have a 96kHz wifi audio interface with MIDI...? Anyone see an
obvious catch?
Sounds interesting. I've no experience of wifi. What's the
reliability and latency like? 
3 Mar
3 Mar
11:11 p.m.
On Tue, 3 Mar 2015, Jonathan E. Brickman wrote:
I have been trying to strategize cutting the USB cord
(right now, one USB, one
Firewire...) for my portable synth on and off for a long time; I really don't
like wearing out USB ports and cables !!!! Was just perusing some of the AoIP
conversation and thinking...and then a thought was given, did a search, and
found:
https://www.hifiberry.com/
It says it is a DAC. Don't you need an ADC?
So, at least in theory, for about $160 or so, I could
get one of those and an RPi
2.0 starter kit, run netjack and qmidinet, and have a 96kHz wifi audio interface
with MIDI...? Anyone see an obvious catch?
As someone else said, "WIFI". This part is: "please try this and tell us
all how it goes." Because this is a stage/live setup, I would question
using 96k, but trust that you have your reasons. I am thinking an OPUS
link would be advantageous because it may handle dropped packets better
than PCM and still has good latency performance.
--
Len Ovens
www.ovenwerks.net
4 Mar
4 Mar
2:23 a.m.
I have been
trying to strategize cutting the USB cord (right now, one USB,
one
Firewire...) for my portable synth on and off for a long time; I really
don't
like wearing out USB ports and cables !!!! Was just perusing some of the
AoIP
conversation and thinking...and then a thought was given, did a search, and
found:
https://www.hifiberry.com/
It says it is a DAC. Don't you need an ADC? So, at least
in theory, for about $160 or so, I could get one of those and
an RPi
2.0 starter kit, run netjack and qmidinet, and have a 96kHz wifi audio
interface
with MIDI...? Anyone see an obvious catch?
As someone else said, "WIFI". This part is: "please try this and tell us
all how it goes." Because this is a stage/live setup, I would question
using 96k, but trust that you have your reasons.
The 96k is for the highs. I like to have a very gentle feathery timbre available in the
higher reaches at lower volumes, in strings. The shape of the waveform is very crude, if
you think about it, at 48k in the higher reaches.
I am thinking an OPUS
link would be advantageous because it may handle dropped packets better
than PCM and still has good latency performance.
Had not heard of OPUS. Can you direct me to a reading or three?
--
Jonathan E. Brickman | jeb(a)ponderworthy.com | (785)233-9977
Ponderworthy | http://ponderworthy.com
Music of compassion; fire, and life!!!
2:40 a.m.
On Tuesday, March 03, 2015 6:23:19 PM Jonathan E. Brickman wrote:
The 96k is for the highs. I like to have a very
gentle feathery
timbre available in the higher reaches at lower volumes, in strings.
The shape of the waveform is very crude, if you think about it, at
48k in the higher reaches.
And if you think about it a little more thoroughly you will realize that
a proper low-pass filter completely changes the waveform shape, and 48k
is plenty as long as you don't need to actually generate ultrasonics.
Had not heard of OPUS. Can you direct me to a reading
or three?
It is a xiph.org project (with its own web site):
http://www.opus-codec.org/
--
Chris Caudle
2:45 a.m.
On Tue, 3 Mar 2015, Jonathan E. Brickman wrote:
Some people would dissagree:
http://xiph.org/video/vid2.shtml
Considering what you have said above, you may not like it as it does not
transport anything above 20khz, the native sample rate is 48k.
http://en.wikipedia.org/wiki/Opus_%28audio_format%29
http://opus-codec.org/
--
Len Ovens
www.ovenwerks.net
Because this
is a stage/live setup, I would question
using 96k, but trust that you have your reasons.
The 96k is for the highs. I like to have a very gentle feathery timbre
available in the higher reaches at lower volumes, in strings. The shape
of the waveform is very crude, if you think about it, at 48k in the
higher reaches.
I am thinking
an OPUS
link would be advantageous because it may handle dropped packets better
than PCM and still has good latency performance.
Had not heard of OPUS. Can you direct me to a reading or three? 
2:54 a.m.
On Tue, Mar 3, 2015 at 7:44 PM, Len Ovens <len(a)ovenwerks.net> wrote:
On Tue, 3 Mar 2015, Jonathan E. Brickman wrote:
Because this is a stage/live setup, I would question
http://xiph.org/video/vid2.shtml
and Jonathan, if you haven't seen that video, you owe it to yourself to do
so.
and when you're done, then go watch Ethan Wiener get even deeper into
digital audio myths: https://www.youtube.com/watch?v=BYTlN6wjcvQ
It is nearly an hour long. The first 10 mins or so are different, and not
precisely about digital audio, but psycho-acoustics and still worth
exposing yourself to. The rest is critical to stripping away the BS that
surrounds digital audio technology.
using
96k, but trust that you have your reasons.
The 96k is for the highs. I like to have a very gentle feathery timbre
available in the higher reaches at lower volumes, in strings. The shape of
the waveform is very crude, if you think about it, at 48k in the higher
reaches.
Some people would dissagree: 
10:29 a.m.
On 03/04/2015 02:23 AM, Jonathan E. Brickman wrote:
The shape of the waveform is very crude, if you
think about it, at
48k in the higher reaches.
Everytime somebody writes something like this, God quantizes a kitten to
4 bits.
Jonathan, this notion is non-sensical. The reconstructed analog signal
will be perfect all the way up to the Nyquist frequency minus the
roll-off of the filter. So you needn't worry about your treble range
until at least 20 kHz, and expect only a gently roll-off above.
Your other argument about the low levels does not pertain to sample rate
at all, only to word length. Good Low-level performance means good
dynamic range. For that, 24 bits is plenty. The main thing that's going
to constrain you at low levels is analog noise.
--
Jörn Nettingsmeier
Lortzingstr. 11, 45128 Essen, Tel. +49 177 7937487
Meister für Veranstaltungstechnik (Bühne/Studio)
Tonmeister VDT
http://stackingdwarves.net
2:15 p.m.
On 04/03/15 02:13, Jonathan E. Brickman wrote:
I have been trying to strategize cutting the USB cord
(right now, one USB, one Firewire...) for my portable synth on and off for a long time; I
really don't like wearing out USB ports and cables !!!! Was just perusing some of the
AoIP conversation and thinking...and then a thought was given, did a search, and found:
https://www.hifiberry.com/
So, at least in theory, for about $160 or so, I could get one of those and an
RPi 2.0 starter kit, run netjack and qmidinet, and have a 96kHz wifi audio
interface with MIDI...? Anyone see an obvious catch?
Raspberries and networking and usb and wifi are not a good idea together.
They are great for what they do, but the USB and LAN on them is very poor.
Maybe an Odroid-C1 model with a reasonable USB audio interface and wifi module
would do it better and cheaper (at $35 list price for quad core, GB ethernet,
separate USB2 from the USB-OTG etc etc and similar gpio to the Pi it looks
interesting but I haven't tested it yet) there are now quite a few options
around at the under $200 price level, with different configurations and
processing power.
WIFI isn't what I'd want to be using without a very controlled environment.
If your issue is wear and tear on the cables, can't you arrange some short
extensions, and leave them fixed at each end till they wear out?
Or probably the ethernet sockets are more durable, and GB ethernet would be a
great deal better than WIFI in almost every respect.
the Odroid ...
http://www.hardkernel.com/main/products/prdt_info.php?g_code=G141578608433&…
2:29 p.m.
2015-03-04 14:11 GMT+01:00 Simon Wise <simonzwise(a)gmail.com>om>:
On 04/03/15 02:13, Jonathan E. Brickman wrote:
Although (it seems) it has no audio onboard (anyway I prefer better audio
using an external IF), Odroid + Audio IF seems a good option to RPi +Audio
IF, and its connectivity is great:IR, WiFi, USB3.0 to Gigabit Ethe,
Bluetooth, Ethernet Cable CAT6, USB GPS Module, USB3.0 to SATA3 HDD/SS.
An even better if it has a non-Atom chip so you just can use just any
distro, at least Debian or Musix, without worrying about that specific
architecture and the availability of certain software for it.
--
C. sanchiavedraZ:
* NEW / NUEVO: www.sanchiavedraZ.com
* Musix GNU+Linux: www.musix.es
I have been trying to strategize cutting the USB
cord (right now, one
USB, one Firewire...) for my portable synth on and off for a long time; I
really don't like wearing out USB ports and cables !!!! Was just perusing
some of the AoIP conversation and thinking...and then a thought was given,
did a search, and found:
https://www.hifiberry.com/
So, at least in theory, for about $160 or so, I could get one of those
and an
RPi 2.0 starter kit, run netjack and qmidinet, and have a 96kHz wifi audio
interface with MIDI...? Anyone see an obvious catch?
Raspberries and networking and usb and wifi are not a good idea together.
They are great for what they do, but the USB and LAN on them is very poor.
Maybe an Odroid-C1 model with a reasonable USB audio interface and wifi
module would do it better and cheaper (at $35 list price for quad core, GB
ethernet, separate USB2 from the USB-OTG etc etc and similar gpio to the Pi
it looks interesting but I haven't tested it yet) there are now quite a few
options around at the under $200 price level, with different configurations
and processing power.
WIFI isn't what I'd want to be using without a very controlled environment.
If your issue is wear and tear on the cables, can't you arrange some short
extensions, and leave them fixed at each end till they wear out?
Or probably the ethernet sockets are more durable, and GB ethernet would
be a great deal better than WIFI in almost every respect.
the Odroid ...
http://www.hardkernel.com/main/products/prdt_info.php?g_
code=G141578608433&tab_idx=2
_______________________________________________
Linux-audio-user mailing list
Linux-audio-user(a)lists.linuxaudio.org
http://lists.linuxaudio.org/listinfo/linux-audio-user
3:21 p.m.
On 05/03/15 00:29, Carlos sanchiavedraz wrote:
2015-03-04 14:11 GMT+01:00 Simon
Wise<simonzwise(a)gmail.com>om>:
there are a wide range, the specs you listed are not the C1, so it probably
isn't $35 either ... they look good on paper, but I haven't tested them.
Simon
On 04/03/15 02:13, Jonathan E. Brickman wrote:
Although (it seems) it has no audio onboard (anyway I prefer better audio
using an external IF), Odroid + Audio IF seems a good option to RPi +Audio
IF, and its connectivity is great:IR, WiFi, USB3.0 to Gigabit Ethe,
Bluetooth, Ethernet Cable CAT6, USB GPS Module, USB3.0 to SATA3 HDD/SS.
An even better if it has a non-Atom chip so you just can use just any
distro, at least Debian or Musix, without worrying about that specific
architecture and the availability of certain software for it. I have been trying to strategize cutting the USB
cord (right now, one
USB, one Firewire...) for my portable synth on and off for a long time; I
really don't like wearing out USB ports and cables !!!! Was just perusing
some of the AoIP conversation and thinking...and then a thought was given,
did a search, and found:
https://www.hifiberry.com/
So, at least in theory, for about $160 or so, I could get one of those
and an
RPi 2.0 starter kit, run netjack and qmidinet, and have a 96kHz wifi audio
interface with MIDI...? Anyone see an obvious catch?
Raspberries and networking and usb and wifi are not a good idea together.
They are great for what they do, but the USB and LAN on them is very poor.
Maybe an Odroid-C1 model with a reasonable USB audio interface and wifi
module would do it better and cheaper (at $35 list price for quad core, GB
ethernet, separate USB2 from the USB-OTG etc etc and similar gpio to the Pi
it looks interesting but I haven't tested it yet) there are now quite a few
options around at the under $200 price level, with different configurations
and processing power.
WIFI isn't what I'd want to be using without a very controlled environment.
If your issue is wear and tear on the cables, can't you arrange some short
extensions, and leave them fixed at each end till they wear out?
Or probably the ethernet sockets are more durable, and GB ethernet would
be a great deal better than WIFI in almost every respect.
the Odroid ...
http://www.hardkernel.com/main/products/prdt_info.php?g_
code=G141578608433&tab_idx=2
_______________________________________________
Linux-audio-user mailing list
Linux-audio-user(a)lists.linuxaudio.org
http://lists.linuxaudio.org/listinfo/linux-audio-user
3581
days inactive
3582
days old
linux-audio-user@lists.linuxaudio.org
12 comments
10 participants
participants (10)
-
Carlos sanchiavedraz -
Chris Caudle -
david -
Jonathan E. Brickman -
Jörn Nettingsmeier -
Len Ovens -
Paul Davis -
Peter P. -
Simon Wise -
Will Godfrey