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录音

Pi 4B
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  • J
    jugg last edited by May 24, 2023, 10:35 AM

    d9bfa823-6b36-449c-b07d-33f0aee4a1d8-image.png

    c2738bc1-663a-4f62-bd50-2e27314fc53e-image.png

    录出来没有声音
    确定声音已经接进去了
    另外测试了音频输出是可以的

    G 1 Reply Last reply May 24, 2023, 12:16 PM Reply Quote 0
    • G
      george @jugg last edited by May 24, 2023, 12:16 PM

      @jugg 先使用如下命令测试:

      arecord -D hw:2,0 -d 10 -f cd -r 44100 -c 2 -t wav test.wav
      aplay -D hw:2,0 test.wav
      
      J 2 Replies Last reply Aug 2, 2023, 9:48 AM Reply Quote 0
      • J
        jugg @george last edited by May 25, 2023, 12:55 AM

        @george
        28bf8a75-9eb7-4ef6-a20a-ee5ffcc5f22c-image.png

        G 1 Reply Last reply May 25, 2023, 1:16 AM Reply Quote 0
        • G
          george @jugg last edited by May 25, 2023, 1:16 AM

          @jugg 你用的哪个版本的系统,我这边不会报错。

          J 1 Reply Last reply May 25, 2023, 1:18 AM Reply Quote 0
          • J
            jugg @george last edited by May 25, 2023, 1:18 AM

            @george
            0306的系统

            G 1 Reply Last reply May 25, 2023, 1:27 AM Reply Quote 0
            • G
              george @jugg last edited by May 25, 2023, 1:27 AM

              @jugg 可以使用最新0424版本的系统测试。

              J 2 Replies Last reply May 25, 2023, 4:12 AM Reply Quote 0
              • J
                jugg @george last edited by May 25, 2023, 1:38 AM

                @george
                最新的不是0508吗?
                为什么不用0508的

                G 1 Reply Last reply May 25, 2023, 1:56 AM Reply Quote 0
                • G
                  george @jugg last edited by May 25, 2023, 1:56 AM

                  @jugg 0508是23.04版本

                  1 Reply Last reply Reply Quote 0
                  • J
                    jugg @george last edited by May 25, 2023, 4:12 AM

                    @george
                    我更新了0424的版本
                    能录 但是录出来的文件没有声音

                    G 1 Reply Last reply May 25, 2023, 11:09 PM Reply Quote 0
                    • G
                      george @jugg last edited by May 25, 2023, 11:09 PM

                      @jugg 如下测试命令录音正常,使用苹果4断耳机:

                      coolpi@Ubuntu:~$ arecord -D hw:2,0 -d 10 -f cd -r 44100 -c 2 -t wav test.wav
                      Recording WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
                      coolpi@Ubuntu:~$ aplay test.wav 
                      Playing WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
                      
                      J 1 Reply Last reply May 26, 2023, 12:56 AM Reply Quote 0
                      • J
                        jugg @george last edited by May 26, 2023, 12:56 AM

                        @george
                        我用的两头都是3.5mm的线 接的电脑的耳机输出 另外一头接音响有声音 接到板子上录出来没有声音

                        G 1 Reply Last reply May 26, 2023, 1:24 AM Reply Quote 0
                        • G
                          george @jugg last edited by May 26, 2023, 1:24 AM

                          @jugg 如下图所示,COOLPI录音接口是MIC输入而不是line-in功能,如果要实现line-in功能,需要把电脑的左右声道混音以后衰减然后从coolpi耳机插座的麦克风端接入。
                          89e56413-7abb-4487-83fe-c5d2517d31f8-image.png

                          J 1 Reply Last reply May 26, 2023, 1:52 AM Reply Quote 0
                          • J
                            jugg @george last edited by May 26, 2023, 1:52 AM

                            @george
                            0528f1ea-687c-4a67-9e90-c86376fcf30b-lQDPJxf-k0vW9ArNBNzNCzawXwjyKf9fCvMEZw6eeMAvAA_2870_1244.jpg
                            这种3段的也不行?

                            G 1 Reply Last reply May 26, 2023, 2:27 AM Reply Quote 0
                            • G
                              george @jugg last edited by May 26, 2023, 2:27 AM

                              @jugg 不行,这种三段插入以后MIC引脚就和GND短接了,肯定录不到声音。

                              J 1 Reply Last reply May 26, 2023, 6:08 AM Reply Quote 0
                              • J
                                jugg @george last edited by May 26, 2023, 6:08 AM

                                @george
                                就是说4段的3.5的线就可以是吧

                                G 1 Reply Last reply May 26, 2023, 6:20 AM Reply Quote 0
                                • G
                                  george @jugg last edited by May 26, 2023, 6:20 AM

                                  @jugg 电脑输出的音频信号需要衰减以后才能接入MIC通道。否则增益太大会失真。

                                  J 1 Reply Last reply May 26, 2023, 6:25 AM Reply Quote 0
                                  • J
                                    jugg @george last edited by May 26, 2023, 6:25 AM

                                    @george
                                    我需要怎么做才能把其它声音接入到板子 然后录音

                                    G 1 Reply Last reply May 26, 2023, 7:05 AM Reply Quote 0
                                    • G
                                      george @jugg last edited by May 26, 2023, 7:05 AM

                                      @jugg 如下图所示,电脑的line out输出经过衰减以后接入COOLPI耳机座的MIC输入端。正常麦克风的电平范围控制到20mv以内。所以电阻参数根据电脑line out输出的信号幅度决定。
                                      d080fb7d-ad23-42ce-aa1d-90a15e0f9e97-image.png

                                      1 Reply Last reply Reply Quote 0
                                      • topic:timeago_later,2 months
                                      • J
                                        jugg @george last edited by Aug 2, 2023, 9:48 AM

                                        @george
                                        这样在板子上播出来的是单声道的 就是只有一个耳机有声音 另外一个没有或者是声音非常小
                                        这样的音频线
                                        1d014dd4-e901-4650-bdb6-6d87b235d3ce-lQDPJw4VFbvkzEjNBQDNA8CwFgnEULx9spEEvwZgqoCHAA_960_1280.jpg
                                        但是把文件放电脑上用耳机听 左右声道都有声音

                                        G 1 Reply Last reply Aug 2, 2023, 11:45 AM Reply Quote 0
                                        • G
                                          george @jugg last edited by Aug 2, 2023, 11:45 AM

                                          @jugg 换一个手机上的耳机在机器上播放。

                                          1 Reply Last reply Reply Quote 0
                                          • topic:timeago_later,5 months
                                          • J
                                            jugg last edited by Dec 22, 2023, 8:48 AM

                                            我现在测试CM5的
                                            发现没法录音 提示设备被占用
                                            用的这个固件
                                            20230606-ubuntu-20.04.5-preinstalled-desktop-arm64-cm5-evb-v11.rar
                                            声音可以播放
                                            用的也是上面那个白色的4端音频线

                                            G 1 Reply Last reply Dec 25, 2023, 12:35 AM Reply Quote 0
                                            • G
                                              george @jugg last edited by Dec 25, 2023, 12:35 AM

                                              @jugg 使用如下命令测试

                                              arecord -D hw:2,0 -d 10 -f cd -r 44100 -c 2 -t wav test.wav
                                              aplay -D hw:2,0 test.wav
                                              
                                              J 4 Replies Last reply Dec 25, 2023, 6:10 AM Reply Quote 0
                                              • J
                                                jugg @george last edited by Dec 25, 2023, 1:41 AM

                                                @george 就是用这个命令来试的 提示resource busy 但是没有用这个设备啊

                                                1 Reply Last reply Reply Quote 0
                                                • J
                                                  jugg @george last edited by Dec 25, 2023, 1:51 AM

                                                  @george 3b11579d-2b77-41af-94ad-312ca0886229-lQDPKGe50yzoJNPNA8DNBQCwIJJU1dHEEjEFeUkK_cbQAA_1280_960.jpg

                                                  1 Reply Last reply Reply Quote 0
                                                  • J
                                                    jugg @george last edited by Dec 25, 2023, 1:53 AM

                                                    @george 第一次录可以 然后第二次就录不了 这中间没有再用这个设备了

                                                    1 Reply Last reply Reply Quote 0
                                                    • J
                                                      jugg @george last edited by Dec 25, 2023, 6:10 AM

                                                      @george 又接了一个USB麦克风 也不能录 提示同样的错误
                                                      只能重启 重启后也只能录一次 第二次就不能录了
                                                      后面又测试了一下 发现是因为在开机之前接了一个显示屏和一个HDMI显示器 开机之后再把HDMI拔掉之后再录音
                                                      就出现上面的情况

                                                      1 Reply Last reply Reply Quote 0
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