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

-- do it yourself http://antoine.villeret.free.fr http://drii.ensad.fr -- Google lit ce mail... si vous refusez cela, utilisez l'adresse antoine.villeret [at] free.fr pour me contacter 2012/9/18 Pierre Massat pimassat@gmail.com > Why do you need to compile it?.. > > > > 2012/9/17 Cyrille Henry ch@chnry.net > >> hello, >> yes, you are right, there is a typo. >> it's >> git clone git://pure-data.git.**sourceforge.net/gitroot/pure-** >> data/pure-datahttp://pure-data.git.sourceforge.net/gitroot/pure-data/pure-data >> (or git clone git://pure-data.git.**sourceforge.net/gitroot/pure-** >> data/pure-datahttp://pure-data.git.sourceforge.net/gitroot/pure-data/pure-datapure-data) >> >> >> try >> sudo apt-get install autoconf >> >> thanks for the feedback, we will correct the documentation. >> >> cheers >> c >> >> >> >> Le 17/09/2012 20:44, m.e.grimm a écrit : >> >> hey, >>> >>> so you know >>> >>> with this i get: >>> >>> pi@raspberrypi ~/Desktop/pure-data/src $ git clone >>> git://pure-data.git.**sourceforge.net/gitroot/pure-**data/http://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-datahttp://pure-data.git.sourceforge.net/gitroot/pure-data/pure-data >>> (no space) >>> >>> but then i get: >>> >>> pi@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@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_Setuphttp://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/http://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/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/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.htmlhttp://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_Loginhttp://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 >>>> >>>> ______________________________**_________________ >>>> Pd-list@iem.at mailing list >>>> UNSUBSCRIBE and account-management -> >>>> http://lists.puredata.info/**listinfo/pd-listhttp://lists.puredata.info/listinfo/pd-list >>>> >>>> >>> >>> >>> >> ______________________________**_________________ >> Pd-list@iem.at mailing list >> UNSUBSCRIBE and account-management -> http://lists.puredata.info/** >> listinfo/pd-list http://lists.puredata.info/listinfo/pd-list >> > > > _______________________________________________ > Pd-list@iem.at mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list > >