[PD] Few steps further on analog synth emulation on RPi

[m.e.grimm]

yup that was it.....

add to instructions?

m

On Mon, Sep 17, 2012 at 2:55 PM, Tedb0t <lists at liminastudio.com> wrote:
> try sudo apt-get install autoconf?
>
> On Sep 17, 2012, at 2:44 PM, m.e.grimm wrote:
>
>> hey,
>>
>> so you know
>>
>> with this i get:
>>
>> pi at raspberrypi ~/Desktop/pure-data/src $ git clone
>> git://pure-data.git.sourceforge.net/gitroot/pure-data/ pure-data
>> Cloning into 'pure-data'...
>> fatal: The remote end hung up unexpectedly
>>
>> so i have to do:
>>
>> git clone git://pure-data.git.sourceforge.net/gitroot/pure-data/pure-data
>> (no space)
>>
>> but then i get:
>>
>> pi at raspberrypi ~/Desktop/pure-data/src $ autoconf-bash: autoconf:
>> command not found
>>
>> where is autoconf?
>>
>> m
>>
>> On Sun, Sep 16, 2012 at 6:38 PM, Antoine Villeret
>> <antoine.villeret at gmail.com> wrote:
>>> hi all, here is an up-to-date tutorial to make an analog synth with a
>>> Raspberry Pi and pd :
>>>
>>> 1. installing raspbian on a SD card
>>>
>>> see instruction :
>>> http://www.raspbian.org/
>>> http://elinux.org/RPi_Easy_SD_Card_Setup
>>>
>>> connect a keyboard, a mouse, an HDMI screen and an ethernet cable with DHCP
>>> (to get internet access) and boot on the SD card to configure the OS :
>>> - expand root
>>> - change keyboard
>>> - change password
>>> - change local (fr utf8)
>>> - change memory split : minimum allocated to video
>>> - enable ssh
>>> - boot : no desktop
>>> - update
>>>
>>> sudo apt-get update / upgrade
>>> sudo reboot
>>> log in and start graphical interface :
>>> startx
>>>
>>> 2. installing puredata
>>>
>>> sudo apt-get install git tk8.5-dev libasound2-dev subversion
>>> downloading latest pd :
>>>
>>> git clone git://pure-data.git.sourceforge.net/gitroot/pure-data/ pure-data
>>> cd pure-data/src
>>> autoconf
>>> ./configure CFLAGS="-mfpu=vfp -mfloat-abi=hard"
>>> make
>>> sudo make install
>>>
>>> It takes around 20min to build, be patient.
>>> you can start pd using the « pd » command
>>>
>>> 3. optimising the system for pd :
>>>
>>> sudo leafpad /etc/security/limits.conf
>>> or try nano if you don’t start an X server
>>> add
>>> * - rtprio 99
>>> * - memlock 1000000000
>>> start pd and go to media > preference > startup
>>> add the following flag in the startup flag field :
>>> -rt -alsa -noadc -audiobuf 25
>>>
>>> then apply and restart pd.
>>>
>>> 4. test
>>>
>>> download analog synth emulation patch by Cyrille Henry here :
>>> svn checkout
>>> https://pure-data.svn.sourceforge.net/svnroot/pure-data/trunk/externals/nusmuk/nusmuk-audio/
>>> ~/nusmuk-audio
>>> cd ~/nusmuk-audio
>>> make
>>> cd examples
>>> pd analog_synth_emulation.pd
>>>
>>> 5. Performance :
>>>
>>> The analog output is very poor now. Some (like Miller) are working on
>>> improving it (thanks for their work). The signal to noise ratio is low and
>>> there is also some quantization distorsion.
>>>
>>> On the other hand, one can output some audio through HDMI. We use an HDMI
>>> display to convert audio and to send it to good quality loudspeaker. We
>>> later tried a USB soundcard (Edirol UA-1A) which works out-of-the-box.
>>>
>>> We tried to reduce latency without hearing click with the Cyrille’s patch,
>>> here are the results :
>>> 10 ms latency with USB soundcard
>>> 20 ms latency with integrated HDMI audio
>>> We also tried to input audio with USB soundcard but audio is crackly as soon
>>> as input is enable (with output too).
>>>
>>> 6. Getting data from real world
>>>
>>> Most of MIDI-USB interface should work out-of-the-box.
>>> With Edirol UM-1EX we get a MIDI loopback between 30 and 35ms.
>>>
>>> HID works great.
>>> svn checkout
>>> https://pure-data.svn.sourceforge.net/svnroot/pure-data/trunk/externals/hid/
>>> ~/hid
>>> cd hid/
>>> make
>>> pd hid-help.pd
>>>
>>> The Byron interface (http://www.1010.co.uk/org/byron.html) is one of the
>>> cheapest way to make a CV-to-computer interface.
>>>
>>> A TCP loop on a local computer takes less than 1.5 ms.
>>>
>>> 7. Autologin
>>>
>>> To enable auto login, we follow this :
>>> http://elinux.org/RPi_Debian_Auto_Login. And to start pd at startup, we
>>> follow the steps on the same page but replace startx by ~/autostart.sh wich
>>> is a script like this :
>>> pd -nogui -audiodev 3 -open
>>> ~/nusmuk-audio/examples/analog_synth_emulation.pd
>>>
>>> _______________________________________________
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>>> http://lists.puredata.info/listinfo/pd-list
>>>
>>
>>
>>
>> --
>> ____________________
>> m.e.grimm | m.f.a | ed.m.
>> megrimm at gmail.com
>> _________________________________
>>
>> _______________________________________________
>> Pd-list at iem.at mailing list
>> UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
>



-- 
____________________
m.e.grimm | m.f.a | ed.m.
megrimm at gmail.com
_________________________________