Hi,
Enrique Erne wrote:
Phil Stone wrote:
Hi Atte,
Now that you're on your way with sssad, there's a nice trick you should know. If you find that loading a preset causes dropouts, consider using a ram disk to hold your presets during performance.
This solved all my dropout problems, and it's easy to do (I can post a script for OS X if anyone wants it).Hi Phil
yes please post the script.
thanks eni
OK. Most of this script is error checking; three lines do all the real work.
This creates the ram disk as a volume called "RamDisk". You can change that name, if you like, by editing the line that begins with "DISK_NAME=..." ____________________________
#!/bin/bash #echo "Creating ramdisk..." if [ -n "$2" ]; then ARG_ERR=ERR; fi if [ -z "$1" ]; then ARG_ERR=ERR; fi if [ -n "$ARG_ERR" ]; then echo 1 argument: size in MB exit fi
MB_SIZE=$1
let "MB_SIZE *= 2048"
echo Creating ${MB_SIZE} 512-blocks ramdisk
CREATED_RAMDISK=hdiutil attach -nomount ram://${MB_SIZE}
echo New block device: ${CREATED_RAMDISK}
DISK_NAME="RamDisk" echo Creating volume with label: ${DISK_NAME} newfs_hfs -v ${DISK_NAME} ${CREATED_RAMDISK} echo Mounting in /Volumes/${DISK_NAME} diskutil mount ${CREATED_RAMDISK}
exit 0 ___________________________
In my case, I call this from another script, which copies the presets I need into the ram disk:
#!/bin/bash # Create a 2M ramdisk: ~/ramdisk 2
# Copy music data to it cp -R ~/PD_Patches/Presets/ /Volumes/RamDisk/Presets/ cp -R ~/PD_Patches/Presets_Meta/ /Volumes/RamDisk/Presets_Meta/ cp -R ~/PD_Patches/Scales/ /Volumes/RamDisk/Scales/ exit 0 _____________________________
Note that this works well for presets, and would probably be okay with small sound files. However, all that's really happening is that the load time is shorter because of faster access to ram as opposed to hard drive. If you load a big enough file, even from ram disk, and it takes longer than one dsp cycle to load, you'll still get dropouts.
Phil Stone pkstonemusic.com