====== Timecode X-check ======

The goal of this page is to compare subframe rounding and handling of fractional framerates of various DAWs and NLE.  --  feel free to add values for any DAW and NLE that is yet missing:

Dial to the given audio-frame number, then change fps setting in the DAW and note down the ''HH:MM:SS.FF'' timecode that corresponds to the given audio-frame.

===== 48K SPS =====

Audio-frame: **964965602**  @ 48KHz

^ Framerate ^   Ardour3   ^  Ardour2.8  ^  Pro-Tools  ^   Pyramix   ^   Cubase    ^   Avid MC   ^
^  23.976   | 05:34:43:08 | 05:34:43:08 | 05:34:43:08 | 05:34:43:08 |             |             |
^  24       | 05:35:03:10 | 05:35:03:10 | 05:35:03:10 | 05:35:03:10 |             |             |
^  24.975   | 05:34:43:09 | 05:34:44:03 |     n/a     |     n/a     |             |             |
^  25       | 05:35:03:11 | 05:35:03:11 | 05:35:03:11 | 05:35:03:11 |             |             |
^  29.97    | 05:34:43:10 | 05:34:43:10 | 05:34:43:11 | 05:34:43:11 |             |             |
^  29.97DF  | 05:35:03:14 | 05:35:03:14 | 05:35:03;15 | 05:35:03:15 |             |             |
^  30       | 05:35:03:13 | 05:35:03:13 | 05:35:03:13 | 05:35:03:13 |             |             |
^  30DF     | 05:35:23:17 | 05:35:23:17 | 05:35:23;17 | 05:35:23:17 |             |             |
^  59.94    | 05:34:43:21 | 05:34:43:20 |     n/a     |     n/a     |             |             |
^  60       | 05:35:03:27 | 05:35:03:27 |     n/a     |     n/a     |             |             |
===== 48K SPS + .1% pull-up =====

Audio-frame: **964965602**  @ 48KHz + .1% pull up -- effective samplerate 48048 SPS

^ Framerate ^   Ardour3   ^  Ardour2.8  ^  Pro-Tools  ^   Pyramix   ^   Cubase    ^   Avid MC   ^
^  24       | 05:34:43:08 | 05:34:43:08 | 05:34:43:08 |             |             |             |
^  25       | 05:34:43:09 | 05:34:43:09 | 05:34:43:09 |             |             |             |
^  30       | 05:34:43:11 | 05:34:43:11 | 05:34:43:11 |             |             |             |
^  30DF     | 05:35:03:15 | 05:35:03:15 | 05:35:03;15 |             |             |             |


===== 48K SPS - .1% pull-down =====

Audio-frame: **964965602**  @ 48KHz - .1% pull down -- effective samplerate 47952 SPS

^ Framerate ^   Ardour3   ^  Ardour2.8  ^  Pro-Tools  ^   Pyramix   ^   Cubase    ^   Avid MC   ^
^  23.976   | 05:35:03:11 | 05:35:03:10 | 05:35:03:10 |             |             |             |
^  24.975   | 05:35:03:11 | 05:35:04:06 |     n/a     |             |             |             |
^  29.97    | 05:35:03:13 | 05:35:03:13 | 05:35:03:13 |             |             |             |
^  29.97DF  | 05:35:23:18 | 05:35:23:17 | 05:35:23;17 |             |             |             |

===== Versions =====

  * Ardour3: svn rev 13356 
  * Ardour2: 2.8.12 (svn rev 10144)
  * Pro Tools 10 10.2.0 
  * Cubase ??
  * Avid Media Composer ??

===== Notes and Findings =====

==== Ardour3 ====

uses fractions for fractional framerates ie 30000/1001 = 29.970029...

==== Ardour2 ====
 uses limited fixed float for fractional framerates ie. 29.97, 23.976. bug: uses 24.976 instead of 24.975

===== References =====

  * https://en.wikipedia.org/wiki/SMPTE_timecode
  * http://www.andrewduncan.ws/Timecodes/Timecodes.html