Pocket Guitarix?

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Pocket Guitarix?

Tim-2
Hi list.
My needs:

Guitarix
Battery powered
2 Hr or better run time
Pocket sized
For live use
Latency <= 128 frames (at say 44.1Khz)

Are there any pre-built units for this sort of thing
  out there?

If not, I'd take a small embedded board, hopefully
  with enough room for stereo audio jacks, but
  I'll take mono. A midi in jack would be nice.
Any one experienced with this?

What is the state of phones these days
  for real-time audio? Is Guitarix doable?
What about input and output jacks?

Thanks.
Tim.
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Re: Pocket Guitarix?

Patrick Shirkey

> Hi list.
> My needs:
>
> Guitarix
> Battery powered
> 2 Hr or better run time
> Pocket sized
> For live use
> Latency <= 128 frames (at say 44.1Khz)
>
> Are there any pre-built units for this sort of thing
>   out there?
>
> If not, I'd take a small embedded board, hopefully
>   with enough room for stereo audio jacks, but
>   I'll take mono. A midi in jack would be nice.
> Any one experienced with this?
>
> What is the state of phones these days
>   for real-time audio? Is Guitarix doable?
> What about input and output jacks?
>

Have you looked at the mod duo? It is certainly capable of running
guitarix but I suspect it already does.

http://moddevices.com/


--
Patrick Shirkey
Boost Hardware Ltd

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Re: Pocket Guitarix?

gerald mwangi
It does! I use it all the time. But I don't know if it can be battery
powered.

The power adapter outputs 2 A at 12V. It would probably work with a car
battery ;)

Gerald / JimsonDrift
On 08/10/2017 06:44 AM, Patrick Shirkey wrote:

>> Hi list.
>> My needs:
>>
>> Guitarix
>> Battery powered
>> 2 Hr or better run time
>> Pocket sized
>> For live use
>> Latency <= 128 frames (at say 44.1Khz)
>>
>> Are there any pre-built units for this sort of thing
>>    out there?
>>
>> If not, I'd take a small embedded board, hopefully
>>    with enough room for stereo audio jacks, but
>>    I'll take mono. A midi in jack would be nice.
>> Any one experienced with this?
>>
>> What is the state of phones these days
>>    for real-time audio? Is Guitarix doable?
>> What about input and output jacks?
>>
> Have you looked at the mod duo? It is certainly capable of running
> guitarix but I suspect it already does.
>
> http://moddevices.com/
>
>

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Re: Pocket Guitarix?

Robert Jonsson
In reply to this post by Tim-2
Hi TIm,

2017-08-10 5:18 GMT+02:00 Tim <[hidden email]>:
Hi list.
My needs:

Guitarix
Battery powered
2 Hr or better run time
Pocket sized
For live use
Latency <= 128 frames (at say 44.1Khz)

Are there any pre-built units for this sort of thing
 out there?

If not, I'd take a small embedded board, hopefully
 with enough room for stereo audio jacks, but
 I'll take mono. A midi in jack would be nice.
Any one experienced with this?

What is the state of phones these days
 for real-time audio? Is Guitarix doable?
What about input and output jacks?


As other have noted, the MOD DUO is basically built for this, needs 12V power, also needs a pretty big pocket.

If you want to try building something yourself a Raspberry (or some clone) with an USB soundcard should be able to do this, should be possible to get pocket sized.

Phones do have enough horsepower and there's the iRig sound interface to connect tele plugs so it's physically doable. No idea though if guitarix is possible to get running and no idea if latency is OK.
Some years ago Samsung had official support for jackd on their android phones, don't know if this still exists.

Regards,
Robert

 
Thanks.
Tim.
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Re: Pocket Guitarix?

Ralf Mardorf
On Thu, 10 Aug 2017 23:44:40 +0200, Robert Jonsson wrote:
>Some years ago Samsung had official support for jackd on their android
>phones, don't know if this still exists.

Get in contact with coders programming real-time audio software for iOS
as well as Android ;). Android is _not_ real-time capable.
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Re: Pocket Guitarix?

Roger E
In reply to this post by gerald mwangi
On 11/08/17 06:37, Gerald Mwangi wrote:
> It does! I use it all the time. But I don't know if it can be battery
> powered.
>
> The power adapter outputs 2 A at 12V. It would probably work with a
> car battery ;)
You could probably run it with a 3 cell Lithium Polymer battery which
has a voltage of 12.6V when fully charged. These are readily available
for remote control models and a large one 5000 -10000mAH would run it
for many hours.
  I have a 2600mAH one with a USB stepdown which charges a mobile phone
several times. And a 6 cell 5000mAH one which runs my 1.5m RC helicopter
for 10 minutes with up to 100A current draw.


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Re: Pocket Guitarix?

Hermann Meyer
In reply to this post by Tim-2


Am 10.08.2017 um 05:18 schrieb Tim:

> Hi list.
> My needs:
>
> Guitarix
> Battery powered
> 2 Hr or better run time
> Pocket sized
> For live use
> Latency <= 128 frames (at say 44.1Khz)
>
> Are there any pre-built units for this sort of thing
>  out there?
>
> If not, I'd take a small embedded board, hopefully
>  with enough room for stereo audio jacks, but
>  I'll take mono. A midi in jack would be nice.
> Any one experienced with this?
>
> What is the state of phones these days
>  for real-time audio? Is Guitarix doable?
> What about input and output jacks?
>
> Thanks.
> Tim.
>

Here is a project which do that:

https://github.com/rabits/onebutton



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Re: Pocket Guitarix?

Ralf Mardorf
On Fri, 11 Aug 2017 19:53:18 +0200, Hermann Meyer wrote:

>Am 10.08.2017 um 05:18 schrieb Tim:
>> Guitarix
>> Battery powered
>> 2 Hr or better run time
>> Pocket sized
>> For live use
>> Latency <= 128 frames (at say 44.1Khz)
>Here is a project which do that:
>
>https://github.com/rabits/onebutton

Hi,

"The ODROID-C2 consumes less than 0.8A in most cases" -
http://odroid.com/dokuwiki/doku.php?id=en:c2_hardware

The ESI UDJ6 and ESI Maya 22 USB are bus powered, unfortunately
downloading the data sheets from the ESI homepage doesn't work for me.

"the voltage at the hub port is specified to be in the range 5.00+0.25
−0.60 V by USB 2.0"
"High-power devices draw at least 1 unit load and at most 5 unit loads
(500 mA)" - https://en.wikipedia.org/wiki/USB#USB_2.0

So IIUC required are likely around 1,5A at 5V, for at least 2 hours.

Would be a battery as recommended at

https://electronics.stackexchange.com/questions/98896/good-portable-5v-1-5a-power-source

be sufficient?

Regards,
Ralf
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Re: Pocket Guitarix?

Tim-2


On 08/11/2017 02:52 PM, Ralf Mardorf wrote:

> On Fri, 11 Aug 2017 19:53:18 +0200, Hermann Meyer wrote:
>> Am 10.08.2017 um 05:18 schrieb Tim:
>>> Guitarix
>>> Battery powered
>>> 2 Hr or better run time
>>> Pocket sized
>>> For live use
>>> Latency <= 128 frames (at say 44.1Khz)
>> Here is a project which do that:
>>
>> https://github.com/rabits/onebutton
>
> Hi,
>
> "The ODROID-C2 consumes less than 0.8A in most cases" -
> http://odroid.com/dokuwiki/doku.php?id=en:c2_hardware
>
> The ESI UDJ6 and ESI Maya 22 USB are bus powered, unfortunately
> downloading the data sheets from the ESI homepage doesn't work for me.
>
> "the voltage at the hub port is specified to be in the range 5.00+0.25
> −0.60 V by USB 2.0"
> "High-power devices draw at least 1 unit load and at most 5 unit loads
> (500 mA)" - https://en.wikipedia.org/wiki/USB#USB_2.0
>
> So IIUC required are likely around 1,5A at 5V, for at least 2 hours.
>
> Would be a battery as recommended at
>
> https://electronics.stackexchange.com/questions/98896/good-portable-5v-1-5a-power-source
>
> be sufficient?
>
> Regards,
> Ralf

Ooh, this looks nice!
Thanks for all the replies, guys!

I see that even the RPi accepts any regular USB charger battery,
  of which there are compact models available.
And the ODROID also has a compact battery accessory.

I've been through a lot of different effects products over the years.
I'm a proud 20-year owner of a BOSS SE-70 professional rack-mount
  multi-effects unit. Your effects unit becomes like an extension
  of your character and playing. Difficult to recreate. When you try
  other units, it's like, whoa - I can't play this thing...
I've been reading other owners' laments about nothing really replacing
  the SE-70's 'character', but the battery powered GT-1 seems close.
I have a Line6 Pocket Pod, which is great at simulating amps,
  but not so great with the distortion and overdrive.
Actually I don't think it even has a distortion or overdrive stage,
  just the amps. I wonder if anybody's hacked the thing by now...

But I know that if there's one application that should do
  what I need it to do - it's Guitarix. Thanks to Hermann.

I had been using a portable product which has a 10AHr SLA battery
  and a built-in stereo amp and an LED light, plus two AC inverter
  outputs to power my non-battery effects gear (like the SE-70).
But, meh, kind of heavy and battery never lasted and now it's dead.

So now I'm evaluating a Roland Micro Cube amp.
The built-in amp simulations are, well, OK but with my SE-70
  it sounds great, I like it.
I just need to find a good battery powered effects unit to take
  the SE-70's place.

Or go back to running everything from a battery powered inverter again.

Thanks.
Tim.
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