There have been major changes since 03-23-2009 as a result of the beta tests with Bruce Coates and Franziska Schroeder. These changes are unfortunately not documented/commented at the moment, but I’m uploading the source files for the record.

Take the not-so-humble analog computer, a technology with a fascinating past and a (still promising) future. Given that io’s behavior is driven by an N-body simulation, it’s not difficult to imagine an analog port.

Wait, isn’t this sounding a lot like BEAM…?

beta test 05-12-09_00 [mp3]

beta test 05-12-09_01 [mp3]

beta test 05-12-09_02 [mp3]

beta test 05-12-09_03 [mp3]

beta test 05-12-09_04 [mp3]

beta test 05-12-09_05 [mp3]

beta test 05-12-09_06 [mp3]

beta test 05-12-09_07 [mp3]

beta test 05-12-09_08 [mp3]

beta test 05-12-09_09 [mp3]

beta test 05-12-09_10 [mp3]

Performers are io 0.0.1 beta++ (itself), Bruce Coates (saxophone) and Han-earl Park (guitar).

Thanks to the Arts Council of Ireland for supporting this project, to the UCC Department of Music for providing a space in which to carry out this work, to Bruce for his work and feedback on this, and to Jonny Marks for listening and commenting on the proceedings.

Franziska Schroeder and io (Cork, March 26th 2009)

Here is the (not yet annotated) audio documentation of the io++ beta test with Franziska Schroeder on March 26th 2009.

beta test 03-26-09_00 [mp3]

beta test 03-26-09_01 [mp3]

beta test 03-26-09_02 [mp3]

beta test 03-26-09_03 [mp3]

beta test 03-26-09_04 [mp3]

beta test 03-26-09_05 [mp3]

beta test 03-26-09_06 [mp3]

Performers are io 0.0.1 beta++ (itself) and Franziska Schroeder (saxophone).

Thanks to the Arts Council of Ireland for supporting this project, to the UCC Department of Music for providing a space in which to carry out this work, and to Franziska for her work and feedback on this.

• Greater variation in output.
  • Including pseudo-Braxtonian ‘separation’ implemented via interp tables.
  • Implementation of a meta-banalyzer that shakes up the system depending on input variation.
  • Greater variation in the VL70m settings.
• More responsive to external stimulus.
  • Implementation of a meta-banalyzer (see above).
  • Greater number of elements triggered by the banalyzers and the meta-banalyzer.
  • Fix error in the banalyzer+ class.
  • Variable event buffer.
  • Reduction in the damping and absorption parameters in the VL70m model.
• Less and more machine-esque.
  • Reduction in the damping and absorption variables in the VL70m model which results in a more ‘synthetic’ sound,
  • but also disguises the strongly cyclical generator.

Thanks to the Arts Council of Ireland for supporting this project, and to Bruce and Franziska for their time, labor and expertise.

\ banalyzer+
\
\ a "smarter" banalyzer class designed to works in conjunction with the
\ parser classes.
\
\ ob.banalyzer+ clears internal storage and stats after an ALERT: message
\ is called. In addition, ob.banalyzer+ also takes into account the
\ frequency of ALERT: messages and adjusts sensitivity (i.e. the alert
\ threshold) accordingly.

…

\ MOD: HeP 03-24-09 Fix bug that prevented default iv-blyzr-tolerance-cfa from
\                   being set. Now set this during OPEN:

…

: BLYZR.SET.TOLERANCE.CFA   ( mode --  )
    CASE
        static_tolerance  OF  0                          ENDOF
        linear_tolerance  OF  'c blyzr.linear.tolerance  ENDOF
        shift_tolerance   OF  'c blyzr.shift.tolerance   ENDOF
        random_tolerance  OF  'c blyzr.random.tolerance  ENDOF
    ENDCASE
    iv=> iv-blyzr-tolerance-cfa
;

:m PUT.TOLERANCE.MODE:  ( mode --  , select tolerance calculating mode )
    dup  0 3  within?
    IF
        dup  iv=> iv-blyzr-tolerance-mode
    \
        iv-dev-#opened
        IF
            blyzr.set.tolerance.cfa
        ELSE
            drop
        THEN
    ELSE
        drop
        " put.tolerance.mode:"  " unrecognized mode selector"
    THEN
;m

…

:m RAW.OPEN:    (  --  )
    raw.open: super
\
    iv-blyzr-tolerance-mode  BLYZR.SET.TOLERANCE.CFA
;m

…

interp tables (03-23-09)

See: ‘hp->midi early report’ and ‘hp->midi initial test’.

io:io_config

\ MOD: HeP 11-09-08 Make io_min_pulse and io_max_pulse dependent on
\                   io_rtc_rate.
\ MOD: HeP 03-22-09 Setting of rtc.rate! and time-advance moved to io_glob.

io:io_glob

\ MOD: HeP 03-22-09 Setting of rtc.rate! and time-advance moved from
\                   io_config.
\                   Add (MODIFY.TIME.ADVANCE) called by the meta-alert-matrix.
\                   See: io_matrix.

io:modules:io_interp_table

\ MOD: HeP 10-26-08 Add the io_interp_table component.
\ MOD: HeP 11-04-08 Make the pitch tables 4 bytes wide because they need
\                   to contain signed data.
\ MOD: HeP 11-05-08 Provisional test of the table lookup version of hp->midi
\                   suggests that it is almost twice as fast as the old
\                   version (12725 msec for 10,000,000 conversions in
\                   comparison to 20413 msec).
\ MOD: HeP 11-06-08 Use !BYTES.
\ MOD: HeP 11-07-08 hp_ conversion words (e.g. HP->MIDI ) now reside in
\                   io:mobules:io_interp_table.
\ MOD: HeP 11-08-08 Add words to be called from io_matrix.
\ MOD: HeP 11-09-08 Add tables for output pulse generator.
\                   Initial (klugy) version of the exponential curve.

io:modules:io_interp

\ MOD: HeP 11-05-08 Provisional test of the table lookup version of hp->midi
\                   (see io:modules:io_interp_table for more details).
\ MOD: HeP 11-07-08 hp_ conversion words (e.g. HP->MIDI ) now reside in
\                   io:mobules:io_interp_table.
\ MOD: HeP 03-22-09 Add (MODIFY.INTERP) stub called by the meta-alert-matrix.
\                   See: io_matrix.

io:modules:io_patches

\ MOD: HeP 04-26-06 Slightly broaden out the note ranges of the vl patches.
\ MOD: HeP 11-09-08 Reduce to two vl patches: ob.vl.patch Floboe and SoprSax!
\ MOD: HeP 03-19-09 Double the those vl patches with variant damping and
\                   absorption. Note that vales of 0 seem to cause problems.
\                   (Based on experiements with Bruce Coates.)

io:io_matrix

\ MOD: HeP 11-08-08 Call words to alter the conversion of hp_ coordinates to
\                   midi. See the file modules:io_interp_table for more info.
\ MOD: HeP 03-21-09 Add meta-alert-matrix.

io:io_input

\ MOD: HeP 03-20-09 Add meta-blyzer. We have an alert for alerts. ToDo: Need
\                   someway of triggering changes of patch, interp-tables and
\                   time-advance values from this.
\ MOD: HeP 03-21-09 See: io_matrix for details on what the meta-blyzer
\                   triggers.

io:io_output

\ MOD: HeP 11-09-08 Use table lookup to derive new pulse and pulse groupings.
\ MOD: HeP 03-21-09 Add (MODIFY.PATCH) called by the meta-alert-matrix. See:
\                   io_matrix.

beta test 12-08-08_00 [mp3]

beta test 12-08-08_01 [mp3]

beta test 12-08-08_02 [mp3]

beta test 12-08-08_03 [mp3]

beta test 12-08-08_04 [mp3]

beta test 12-08-08_05 [mp3]

beta test 12-08-08_06 [mp3]

beta test 12-08-08_07 [mp3]

Performers are io 0.0.1 beta++ (itself), Bruce Coates (saxophone) and Han-earl Park (guitar).

Thanks to the Arts Council of Ireland for supporting this project, to the UCC Department of Music for providing a space in which to carry out this work, and to Bruce for his time and labor in support of this project.

io001b.com

beta test 11-10-08_00 [mp3]

beta test 11-10-08_01 [mp3]

beta test 11-10-08_02 [mp3]

beta test 11-10-08_03 [mp3]

beta test 11-10-08_04 [mp3]

beta test 11-10-08_05 [mp3]

Performers are io 0.0.1 beta++ (itself), Franziska Schroeder (saxophone) and Han-earl Park (guitar).

Thanks again to the Arts Council of Ireland for supporting this project, to the UCC Department of Music for providing a space in which to carry out this work, and to Franziska for lending her time and expertise to this enterprise.