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midibox_sd_card_sample_player [2011/12/22 23:43] leeby5 |
midibox_sd_card_sample_player [2012/05/29 21:14] (current) leeby5 |
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====== MIDIbox SD Card Polyphonic Sample Player ====== | ====== MIDIbox SD Card Polyphonic Sample Player ====== | ||
- | This is a brief description of a project in progress to play back samples in real time from an SD card to an I2S based DAC on the Midibox. It will play a number of samples simultaneously, mixing the output to the DAC, the number of samples depends upon the performance of the SD card. | + | This is a brief description of a project to play back samples in real time from an SD card to an I2S based DAC on the Midibox. It will play a number of samples simultaneously, mixing the output to the DAC, the number of samples depends upon the performance of the SD card. |
===== Hardware ===== | ===== Hardware ===== | ||
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* You can do sample hold per sample, eg have a bank where drum sounds are on some notes, and other non-hold samples such as bass are on other notes | * You can do sample hold per sample, eg have a bank where drum sounds are on some notes, and other non-hold samples such as bass are on other notes | ||
* It now supports velocity sensitivity, and this is translated to volume via a look up table | * It now supports velocity sensitivity, and this is translated to volume via a look up table | ||
- | * Bank switching is supported on the fly (ie without a reboot) - though program change isn't there yet | + | * Bank switching (MIDI program change) is supported on the fly (ie without a reboot) |
* Thanks to TK the sector positions on the SD card are cached leading to much better stability with multiple notes sounding | * Thanks to TK the sector positions on the SD card are cached leading to much better stability with multiple notes sounding | ||
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* Now uploaded to the MIOS32 SVN at: | * Now uploaded to the MIOS32 SVN at: | ||
* [[http://svnmios.midibox.org/listing.php?repname=svn.mios32&path=%2Ftrunk%2Fapps%2Fsynthesizers%2FSD+card+sample+player%2F]] | * [[http://svnmios.midibox.org/listing.php?repname=svn.mios32&path=%2Ftrunk%2Fapps%2Fsynthesizers%2FSD+card+sample+player%2F]] | ||
+ | |||
+ | ===== More info ===== | ||
+ | * A write up and more info on my site at [[http://www.bassmaker.co.uk|Bassmaker]] |