Creating a wireless MIDI connection between computers

since: 2015/06/29
update: 2015/06/29
reference:
1. Mac OS:Creating a wireless MIDI connection between computers
2. How to send Midi via Wifi on Mac - Tutorial on Vimeo

A. 功能定義:
     1. Master (主控)端:
         利用 Processing 程式, 將 MIDI 訊號藉由( 程式 / Ableton Live) 輸出給 Slave 端.

     2. Slave (隨從)端:
         輸入(接受) Master 端送來的 MIDI 訊號, 播放對應的音軌效果.

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B. MIDI 網路設定:
    1. Master 端:
        a. 工具程式 > 音訊 MIDI 設定:

        b. 視窗 > 顯示 MIDI 錄音室
             > 雙擊 "網路"

        c. > 在左上方,  "我的區段", 按下 "+" 新增一個區段.
            > 於右上方, 勾選 "已啟用", 並將 "本機名稱" 與 "Bonjour 名稱" 設為:
                Wireless MIDI Master

            > 在左下方, 將 "可能連接本機的有": 設為 "所有參與者"

    2. Slave 端:
        類似 Master 的方式:
        > 在左上方,  "我的區段", 按下 "+" 新增一個區段.
        > 於右上方, 勾選 "已啟用", 並將 "本機名稱" 與 "Bonjour 名稱" 設為:
           Wireless MIDI Slave

        > 在左下方, 將 "可能連接本機的有": 設為 "所有參與者"

    3. 建立 Master 與 Slave 區段的連結:
        a. 於 Master 端:
            先點選 "Wireless MIDI Master" 區段,
            再點選目錄內的 "Wireless MIDI Slave",
            按下 "連線" 後, 可於右方的 "參與者" 看到 "Wireless MIDI Slave"

        b. 於 Slave 端:
            先點選 "Wireless MIDI Slave" 區段,
            再點選目錄內的 "Wireless MIDI Master",
            按下 "連線" 後, 可於右方的 "參與者" 看到 "Wireless MIDI Master"

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C. Ableton Live 偏好設定:
    1. Master 端:
        將 Wireless MIDI Master 網路輸出的 Track, Sync, Remote 皆設成 On. 

        備註: 由於在此例 MIDI 訊號是由 Processing 程式送出, 因此關閉 Ableton Live ,
                  也可正常運作, 亦即不需要設定 Ableton Live (尚未驗證).

    2. Slave 端:
        將 Wireless MIDI Master 網路輸入的 Track, Sync, Remote 皆設成 On.

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D. 音軌 Mapping:
     Slave 端:
     1. 拖拉一個 Drum Rack 到下方, 確認按鍵與位置的對應, 在此為:
          "A 鍵" 對應到 "C5" 位置.

     2. 將一個音效拖拉到剛剛 "C5" 的位置, 並按下 "A 鍵", 來確認是否有聽到聲音播放.

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E. Processing 程式:
    1. MIDI Note Numbers Mappings

    說明: 由上表可查得 C5 對應到 Note Number 為: 84

    2. Master 端:
        開啟 Processing 轉寫程式如下:

import themidibus.*; //Import the MIDI library

MidiBus myBus; // The MidiBus

void setup() {
  size(400, 400);
  background(0);

  MidiBus.list();
  // Create a new MidiBus with no input device
  // and the "Wireless MIDI Master" as output device.
  myBus = new MidiBus(this, -1, "Wireless MIDI Master");
}

void draw() {
  int channel = 0; // 頻道: 0 ~ 15
  int pitch = 84; // 音調
  int velocity = 127; // 速度

  Note note = new Note(channel, pitch, velocity);
  myBus.sendNoteOn(note);
  delay(2000);
 
  myBus.sendNoteOff(note);

  int number = 0;
  int value = 120;
  ControlChange change = new ControlChange(channel, number, value);
  myBus.sendControllerChange(change); // Send a controllerChange
  delay(1000);
}

void delay(int time) {
  int current = millis();
  while (millis () < current+time) Thread.yield();
}

Processing: MIDI Mappings To Ableton Live With The MidiBus

since: 2015/06/26
update: 2015/06/26
reference:
1. Small But Digital - The MidiBus
2. snoize: MIDI Monitor

A. Create a virtual MIDI Port:
    1. 應用程式 > 工具程式 > 音訊 MIDI 設定.app

   2. 視窗 > 顯示 MIDI 錄音室

   3. 滑鼠雙擊 IAC (Inter-application communication) 驅動程式:

    4. 勾選: 裝置已接上電腦; 新增自訂名稱的傳輸埠, 即完成.

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B. Setup virtual MIDI Port on Processing: 
     說明: 我們的目的是要從 Processing 發送 MIDI 訊號給 Ableton Live 接收,
               1. 程式本身不需要輸入 MIDI 訊號, 因而將 Input Device 設成 -1.
               2. 而將 MIDI 訊號 Output 到剛剛新增的 virtual MIDI Port: "IAC_MIDI"

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C. Setup virtual MIDI Port on Ableton Live: 
     說明:

     1. Ableton Live > Preferences > MIDI Sync
     2. 將 Processing 用來 Output MIDI 訊號的 virtual MIDI Port: "IAC_MIDI",
         設定成 Ableton Live 的 Input MIDI Port, 並且將其 Track 與 Remote 設成 On.

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D. 製作音軌資料, 並將上方的量化選單(Quantization Menu)設成:
     None (不使用節拍)

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E. Processing 擊鼓模擬:  
     ---> 發送 ControllerChange 訊號給 Ableton Live

    固定值:
    int channel = 0; // 頻道: 0 ~ 15
    int controllerValue = 127;

    調整值:
    int controllerNumber = 0;  // 0, 1, 2, 3 .....

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F. Ableton Live: MIDI Mappings
    1. 按下 Ableton Live 右上方的 "MIDI", 切換到 MIDI Map 模式.
    2. 每次點取不同的音軌, 接著執行 Processing 程式發送出 ControllerChange 訊號.
    3. Ableton Live 會自動將所接收到的 ControllerChange 訊號,
        與所點取的 音軌 作Mapping.   

AppleScript: Checking memory every 30 sec. If it is about to out of memory then restart OS

since: 2015/06/14
update: 2015/06/14

A. 撰寫 Applescript:
    1. 開啟 Automator:

   
     2. Automator > 檔案 > 新增 > 應用程式 > 選擇:

    
     3. 工具程式 > 執行 AppleScript > 拖拉到右方

    4. 預設程式碼:
on run {input, parameters}
   
    (* Your script goes here *)
   
    return input
end run



    5. 修改如下:
on run {input, parameters}
   
    repeat
       
        # query memory free (MB)
        set vmStats to (text 12 thru -2 of (do shell script "vm_stat | grep 'Pages free'")) * 4096 / 1024 / 1024
        
        # if vmStats <= 500 MB
        if vmStats <= 500 then
       
            # show dialog message (for debug used)           
            #display dialog vmStats with title "Memory Free (MB)" buttons {"OK"} default button 1
           
            # kill your app   
            tell application "System Events"
                set ProcessList to name of every process
                    # "my_app" is your app name                   
                    if "my_app" is in ProcessList then
                        set ThePID to unix id of process "my_app"
                        # kill "my_app" process                      
                        do shell script "kill -KILL " & ThePID
                    end if
            end tell
   
            # restart the OS
            tell application "Finder"
                restart
            end tell
   
        end if
       
        # delay 30 second       
        delay 30
       
    end repeat
   
    return input
end run

Processing: Get Free Memory Info With AppleScript

since: 2015/06/10
update: 2015/06/10
reference:
1. Troubleshooting · processing/processing Wiki
2. Applescript show free memory | Apple Support Communities
3. AppleScript: Essential Sub-Routines
4. io - How do I write to a text file using AppleScript? - Stack Overflow

A. 撰寫 Applescript:
    1. 開啟 Automator:

   
     2. Automator > 檔案 > 新增 > 應用程式 > 選擇:

    
     3. 工具程式 > 執行 AppleScript > 拖拉到右方

    4. 預設程式碼:
on run {input, parameters}
   
    (* Your script goes here *)
   
    return input
end run



    5. 修改如下:
on run {input, parameters}
   
   
    # get the number of free pages using 'vm_stat' and multiply by the page size
    set vmStats to (text 12 thru -2 of (do shell script "vm_stat | grep 'Pages free'")) * 4096
    # display dialog vmStats with title "Memory usage" buttons {"OK"} default button 1
   
    # write to file
    set someText to number_to_string(vmStats)
   
    set textFile to "/Lanli/RD/Projects/Processing/memory_test/free_mem.txt"
    do shell script "echo  " & quoted form of someText & " >  " & quoted form of textFile
   
   
    return input
end run

# A sub-routine that converts numeric values to strings
on number_to_string(this_number)
    set this_number to this_number as string
    if this_number contains "E+" then
        set x to the offset of "." in this_number
        set y to the offset of "+" in this_number
        set z to the offset of "E" in this_number
        set the decimal_adjust to characters (y - (length of this_number)) thru ¬
            -1 of this_number as string as number
        if x is not 0 then
            set the first_part to characters 1 thru (x - 1) of this_number as string
        else
            set the first_part to ""
        end if
        set the second_part to characters (x + 1) thru (z - 1) of this_number as string
        set the converted_number to the first_part
        repeat with i from 1 to the decimal_adjust
            try
                set the converted_number to ¬
                    the converted_number & character i of the second_part
            on error
                set the converted_number to the converted_number & "0"
            end try
        end repeat
        return the converted_number
    else
        return this_number
    end if
end number_to_string

    6. 檔案 > 儲存: 
        /Lanli/RD/Projects/Processing/memory_test/free_mem.app

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B. 開啟 Processing 撰寫程式如下:
import java.util.Date;

String words1;
String words2;
String words3;
String words4;

long allocated;
long free;
long maximum;
long checkTimer;

String[] config;
float free_mem;

void setup() {
  frameRate(15);
  size(400, 400);
  textSize(24);
 
  words1 = "";
  words2 = "";
  words3 = "";
  words4 = "";
 
  checkTimer = (new Date()).getTime();

  //  File[] roots = File.listRoots();
  //
  //  // For each filesystem root, print some info 
  //  for (File root : roots) {
  //    println("File system root: " + root.getAbsolutePath());
  //    println("Total space (bytes): " + root.getTotalSpace());
  //    println("Free space (bytes): " + root.getFreeSpace());
  //    println("Usable space (bytes): " + root.getUsableSpace());
  //  }
}

void draw() {
  background(0);

  if ((new Date()).getTime() - checkTimer >= 2000) {
    checkTimer = (new Date()).getTime();

    open("/Lanli/RD/Projects/Processing/memory_test/free_mem.app");
    //delay(250);
    config = loadStrings("free_mem.txt"); 
    free_mem = float(config[0]) / 1024 / 1024; 

    // The amount of memory allocated so far (usually the -Xms setting)
    allocated = Runtime.getRuntime().totalMemory() / 1024 /1024;

    // Free memory out of the amount allocated (value above minus used)
    free = Runtime.getRuntime().freeMemory() / 1024 /1024;

    // The maximum amount of memory that can eventually be consumed
    // by this application. This is the value set by the Preferences
    // dialog box to increase the memory settings for an application.
    maximum = Runtime.getRuntime().maxMemory() / 1024 / 1024; 

    words1 = "app allocated = "+ allocated + " MB";
    words2 = "app free = "+ free + " MB";
    words3 = "app maximum = "+ maximum + " MB";
    words4 = "sys free_mem = "+ free_mem + " MB";
  }

  text(words1, 10, 25, 540, 300);
  text(words2, 10, 125, 540, 300);
  text(words3, 10, 225, 540, 300);
  text(words4, 10, 325, 540, 300);

  System.gc();
}
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C. 執行結果:

       備註: 實體記憶體 (8.00 GB) - 記憶體用量 (2.45 GB) - 快取(2.59 GB)
                 = 2.96 GB 接近 3015.1016 MB / 1024 = 2.944 GB

Processing: Play Ableton Live 9 With LiveOSC and oscP5

since: 2015/06/07
update: 2015/06/07
reference:
1. Andreas Schlegel - oscP5
2. LiveOSC 
3. LiveOSC Processing Bridge

A. 在 Ableton Live 上設置 LiveOSC:
     1. 下載 LiveOSC, 檔名: trunk_LiveOSC-141.zip 解壓縮後的 trunk 資料夾下
         有一個 LiveOSC 的資料夾. (其內的 OSCAPI.txt 可看)

     2. 應用程式 > Ableton Live 9 Suite.app > 顯示套件內容:

     3. 將 LiveOSC 資料夾複製到: Contents > App-Resources > MIDI Remote Scripts 下:

     4. 開啟 Ableton Live:
         a. Live > Preferences... > MIDI Sync > Control Surface: LiveOSC

         > 設定好後, 請先關閉 Live, 再重新開啟.

         b. 新增 Live Set , 編輯完成後存檔.

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B. Processing:
     1. 開啟 Processing, 新增 Sketch, 程式碼可完全取自: LiveOSC Processing Bridge

     2. 執行後如下:

Processing: Play GarageBand With Virtual MIDI Cables(Ports) On Mac

since: 2015/06/03
update: 2015/06/03
reference:
1. How to use the IAC Driver - MFA Lab
2. Create virtual MIDI ports on Mac

A. Create a virtual MIDI Port:
    1. 應用程式 > 工具程式 > 音訊 MIDI 設定.app

    2. 視窗 > 顯示 MIDI 錄音室

    3. 滑鼠雙擊 IAC (Inter-application communication) 驅動程式:

    4. 勾選: 裝置已接上電腦; 新增自訂名稱的傳輸埠, 即完成.

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B. GarageBand:
    1. 打開 GarageBand, 點選電子樂, 按下 "選擇"

    2. 檢查 "偏好設定": (預設即可)

    3. 選擇合適的演奏樂器, 檔案 > 儲存

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C. Processing:
     1. 打開 Processing, 新增 Sketch , 並匯入 MidiBus 函式庫:

     2. 撰寫程式碼如下:
import themidibus.*; //Import the library

MidiBus myBus; // The MidiBus

int channel;
int pitch;
int velocity;

int number;
int value;

void setup() {
  size(400, 400);
  background(0);

  // List all available Midi devices on STDOUT.
  // This will show each device's index and name.
  MidiBus.list();
 
  // Create a new MidiBus with no input device and the "IAC_MIDI" as the output device.
  //myBus = new MidiBus(this, -1, 2);
  myBus = new MidiBus(this, "IAC_MIDI", "IAC_MIDI"); // Input, Output device
 
  channel = 0;
  pitch = 64;
  velocity = 127;
 
  number = 0;
  value = 90; 
}

void draw() {

  pitch = int(random(127));
  velocity = int(random(127));

  myBus.sendNoteOn(channel, pitch, velocity); // Send a Midi noteOn
  delay(200);
  myBus.sendNoteOff(channel, pitch, velocity); // Send a Midi nodeOff
 
  myBus.sendControllerChange(channel, number, value); // Send a controllerChange
  delay(2000);
}

void noteOn(int channel, int pitch, int velocity) {
  // Receive a noteOn
  println();
  println("Note On:");
  println("--------");
  println("Channel:"+channel);
  println("Pitch:"+pitch);
  println("Velocity:"+velocity);
}

void noteOff(int channel, int pitch, int velocity) {
  // Receive a noteOff
  println();
  println("Note Off:");
  println("--------");
  println("Channel:"+channel);
  println("Pitch:"+pitch);
  println("Velocity:"+velocity);
}

void controllerChange(int channel, int number, int value) {
  // Receive a controllerChange
  println();
  println("Controller Change:");
  println("--------");
  println("Channel:"+channel);
  println("Number:"+number);
  println("Value:"+value);
}

void delay(int time) {
  int current = millis();
  while (millis () < current+time) Thread.yield();
}

     2. 執行結果: