Changes between Version 3 and Version 4 of BuildingCarrierWave


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Timestamp:
11/27/12 09:58:41 (7 years ago)
Author:
sc
Comment:

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  • BuildingCarrierWave

    v3 v4  
    22 
    33 * Open the captured audio file in [http://audacity.sourceforge.net/ Audacity] 
    4 [[Image(wiki:Attachments:build_carrier_wave-01.jpg)]] 
     4[[Image(wiki:Attachments:build_carrier_wave-01.jpg, 800px)]] 
    55 
    66 * Select a segment to analyze 
    77 
    88 * Hit Ctrl-E to zoom into region 
    9 [[Image(wiki:Attachments:build_carrier_wave-02.jpg)]] 
     9[[Image(wiki:Attachments:build_carrier_wave-02.jpg, 800px)]] 
    1010 
    1111 * Continue zooming until the region is clearly visible 
    12 [[Image(wiki:Attachments:build_carrier_wave-03.jpg)]] 
     12[[Image(wiki:Attachments:build_carrier_wave-03.jpg, 800px)]] 
    1313 
    1414 * A careful visual examination reveals that a repeating signal is present 
     
    1717 
    1818 * In this screenshot the repeating signal is highlighted, consisting pairs of high spikes, grouped into sets of three 
    19 [[Image(wiki:Attachments:build_carrier_wave-04.jpg)]] 
     19[[Image(wiki:Attachments:build_carrier_wave-04.jpg, 800px)]] 
    2020 
    2121 * The first set has been selected in Audacity 
    22 [[Image(wiki:Attachments:build_carrier_wave-05.jpg)]] 
     22[[Image(wiki:Attachments:build_carrier_wave-05.jpg, 800px)]] 
    2323 
    2424 * In order to build the carrier wave start with the longest continuous region of clear, repeating signals 
    2525 
    2626 * Expand the selection from the start of the first set to the start of last set of three pairs 
    27 [[Image(wiki:Attachments:build_carrier_wave-06.jpg)]] 
     27[[Image(wiki:Attachments:build_carrier_wave-06.jpg, 800px)]] 
    2828 
    2929 * Zoom to the maximum level of detail at the start of the selected zone 
     
    3838 
    3939 * Notice that the region of the track highlights to the left of the mouse cursor is actually some distance away from the mouse cursor. This behaviour seems somewhat odd, but can be ignored for the moment 
    40 [[Image(wiki:Attachments:build_carrier_wave-07.jpg)]] 
     40[[Image(wiki:Attachments:build_carrier_wave-07.jpg, 800px)]] 
    4141 
    4242 * Zoom and scroll to the end of the selected area 
     
    5151 
    5252 * We now have selected a perfectly repeating wave, containing four complete copies of the carrier signal 
    53 [[Image(wiki:Attachments:build_carrier_wave-08.jpg)]] 
     53[[Image(wiki:Attachments:build_carrier_wave-08.jpg, 800px)]] 
    5454 
    5555 * Zoom back out in order to see the entire selected area 
     
    5858 
    5959 * Select "Split Stereo to Mono" in order to separate the control signal (left channel, on the top) from the carrier wave (right channle, at the bottom) 
    60 [[Image(wiki:Attachments:build_carrier_wave-09.jpg)]] 
    61  
     60[[Image(wiki:Attachments:build_carrier_wave-09.jpg, 800px)]] 
    6261 * We now have two Mono audio tracks 
    63 [[Image(wiki:Attachments:build_carrier_wave-10.jpg)]] 
     62[[Image(wiki:Attachments:build_carrier_wave-10.jpg, 800px)]] 
    6463 
    6564 * Delete the control signal (on the top) by clicking the "X" marker to the left of the track name 
     
    6867 
    6968 * Hit Ctrl-C to copy the selected region 
    70 [[Image(wiki:Attachments:build_carrier_wave-11.jpg)]] 
     69[[Image(wiki:Attachments:build_carrier_wave-11.jpg, 800px)]] 
    7170 
    7271 * Delete the carrier signal track 
    73 [[Image(wiki:Attachments:build_carrier_wave-12.jpg)]] 
     72[[Image(wiki:Attachments:build_carrier_wave-12.jpg, 800px)]] 
    7473 
    7574 * Hit Ctrl-X to paste only the selected region into the track editor 
    76 [[Image(wiki:Attachments:build_carrier_wave-13.jpg)]] 
     75[[Image(wiki:Attachments:build_carrier_wave-13.jpg, 800px)]] 
    7776 
    7877 * Zoom in to see the pasted signal 
    7978 
    8079 * Press Home to "Skip to Start" of the track 
    81 [[Image(wiki:Attachments:build_carrier_wave-14.jpg)]] 
     80[[Image(wiki:Attachments:build_carrier_wave-14.jpg, 800px)]] 
    8281 
    8382 * Press Ctrl-V to past another copy of the signal into the track editor 
    8483 
    8584 * Press Home to return to the start of the track 
    86 [[Image(wiki:Attachments:build_carrier_wave-16.jpg)]] 
     85[[Image(wiki:Attachments:build_carrier_wave-16.jpg, 800px)]] 
    8786 
    8887 * Repeat this process, building a longer and longer track containing the carrier signal 
    89 [[Image(wiki:Attachments:build_carrier_wave-17.jpg)]] 
     88[[Image(wiki:Attachments:build_carrier_wave-17.jpg, 800px)]] 
    9089 
    9190 * By hovering the mouse cursor over the line segments and clicking the left button, the segments can be joined together into a single contiguous track 
    92 [[Image(wiki:Attachments:build_carrier_wave-18.jpg)]] 
     91[[Image(wiki:Attachments:build_carrier_wave-18.jpg, 800px)]] 
    9392 
    9493 * Continue this process until at least one second has been created 
    95 [[Image(wiki:Attachments:build_carrier_wave-19.jpg)]] 
     94[[Image(wiki:Attachments:build_carrier_wave-19.jpg, 800px)]] 
    9695 
    9796 * Copy the entire second and repeat the copy-and-paste procedure until building a carrier signal track of the desired length (in this case 10 seconds) 
    98 [[Image(wiki:Attachments:build_carrier_wave-20.jpg)]] 
     97[[Image(wiki:Attachments:build_carrier_wave-20.jpg, 800px)]] 
    9998 
    10099 * Join all segments until the entire track is complete 
    101 [[Image(wiki:Attachments:build_carrier_wave-21.jpg)]] 
     100[[Image(wiki:Attachments:build_carrier_wave-21.jpg, 800px)]] 
    102101 
    103102== Optional: Create a Stereo version of the Carrier Signal == 
     
    112111 
    113112 * Export the stereo track to a WAV file 
    114 [[Image(wiki:Attachments:build_carrier_wave-22.jpg)]] 
     113[[Image(wiki:Attachments:build_carrier_wave-22.jpg, 800px)]]