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 Forum index » Advanced Topics » Additional Software (PETs, n' stuff) » Multimedia
Thomas Virtual Piano
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TecnoGuy458

Joined: 26 Jan 2015
Posts: 124
Location: Ohio
PostPosted: Sat 21 Nov 2015, 16:56    Post subject:  Thomas Virtual Piano
Subject description: Virtual PC speaker Piano		  
GitHub: https://github.com/ThomasTheSpaceFox/Thomas-Virtual-Piano

.PET attached below.

uses Bash, gtkdialog and beep, to allow the user to play a small virtual piano through their PC speaker.

piano specs: 4 piece percussion. keys 21-40.
ThomasVirtualPiano-v1.3.pet
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TecnoGuy458

Joined: 26 Jan 2015
Posts: 124
Location: Ohio
PostPosted: Sat 21 Nov 2015, 16:59    Post subject: Thomas Virtual Piano  
screenshot:
piano-capture29690.png
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zigbert


Joined: 29 Mar 2006
Posts: 6587
Location: Valåmoen, Norway
PostPosted: Tue 24 Nov 2015, 00:40    Post subject:  
Like it - even if beep don't give sound on my system Very Happy

If you would like to consider it, I have rearranged your code. Just to give an example of another coding structure. Thomas-Virtual-Piano.sh has gone from 224 to 68 codelines, and the gui is more compact. - Narrower, but with the same key-size.

Code:
#!/bin/bash
WHEREAMI="$(cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd && echo)"
cd $WHEREAMI

build_key (){
   SOUND=$(cut -d_ -f1 <<< "$1")
   COLOR=$(cut -d_ -f2 <<< "$1")
   echo '<vbox>
     <pixmap><input file>'$2'.png</input></pixmap>
      <button relief="2">
        <action>"beep -f '$SOUND'"</action>
        <input file>"key'$COLOR'.png"</input>
      </button>
   </vbox>'
}
export -f build_key

export DIALOG='
<window resizable="false" title="Thomas Virtual Piano" image-name="Thomas-Virtual-Piano.png">
  <vbox>
    <hbox>
      <pixmap>
        <input file>speaker.png</input>
      </pixmap>
      <button ok></button>
      <button>
        <label>"About"</label>
        <action>"'$WHEREAMI'/about.sh"</action>
      </button>
      <hbox scrollable="true" width-request="10" height="30" >
        <pixmap>
          <input file>bar.png</input>
        </pixmap>
      </hbox>
      <button>
        <action>"beep -f 300 -l 40 -n -f 400 -l 5 -n -f 250 -l 15 -n -f 100 -l 10"</action>
        <input file>"cymbal.png"</input>
      </button>
      <button>
        <action>"beep -f 300 -l 40 -n -f 400 -l 5 -n -f 300 -l 10"</action>
        <input file>"hithat.png"</input>
      </button>
      <button>
        <action>"beep -f 60 -l 40"</action>
        <input file>"bdrum.png"</input>
      </button>
      <button>
        <action>"beep -f 100 -l 40"</action>
        <input file>"ldrum.png"</input>
      </button>
      <text>
        <label>"Thomas Virtual Piano"</label>
      </text>
      <pixmap>
        <input file>speaker.png</input>
      </pixmap>
    </hbox>
    <hbox spacing="0">'
    NR=21
    for KEY in 87_w 92_b 98_w 104_b 110_w 116_b 123_w 131_w 138_b 147_w 155_b 165_w 175_w 185_b 196_w 208_b 220_w 233_b 247_w 262_w; do
      export DIALOG="$DIALOG $(build_key $KEY $NR)"
      NR=$(($NR+1))
    done
   export DIALOG="$DIALOG </hbox>
  </vbox>
</window>"

gtkdialog --space-expand=true --space-fill=true --program DIALOG

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TecnoGuy458

Joined: 26 Jan 2015
Posts: 124
Location: Ohio
PostPosted: Tue 24 Nov 2015, 22:11    Post subject: ill look into it later.  
looks nice! Very Happy i will try it later. currently busy extending my Terminal Image System's color pallet. Cool

btw on a side note,

that $WHEREAMI thing is a neat trick isn't it? Very Happy
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nubc


Joined: 23 Jan 2007
Posts: 2031
Location: USA
PostPosted: Wed 25 Nov 2015, 00:18    Post subject:  
Ever considered the chromatic keyboard?
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gcmartin

Joined: 14 Oct 2005
Posts: 6730
Location: Earth
PostPosted: Wed 25 Nov 2015, 02:43    Post subject:  
This would be a nice musical app for a touch-screen PC. Would be nice if it came with distro's Menu>Games folder, as, say "20key Piano" I will try it, later.

Question
As it currently is 20keys, is the number of keys selectable; say, 44keys or 88keys for large touch screens?
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don570


Joined: 10 Mar 2010
Posts: 5345
Location: Ontario
PostPosted: Thu 26 Nov 2015, 20:45    Post subject:  
There are other ways to generate a beep noise like the command speaker-test
Code:
speaker-test -c2 -t sine

Quote:


You might look at speaker-test, which (on an Arch machine) I find in alsa-utils package.

speaker-test -c2 -t sine run from an xterm, gave me a 440 Hz sine wave for about 6 seconds each, alternating left and right speakers. In the xterm, it gave some information about which speaker it thought it was using.

According to the man page, it can do sine waves of arbitrary frequency and pink noise.
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