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

[m.e.grimm]

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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>



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