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如何使用 PyAudio 或 PortAudio 获取设备的音频采样率列表？

发布于 2024-10-10 18:54:31 字数 97 浏览 3 评论 0原文

我想查询我的音频设备并获取其所有可用的采样率。我正在使用 PyAudio 0.2，它在带有 Python 2.6 的 Ubuntu 机器上运行在 PortAudio v19 之上。

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浮生未歇 2024-10-17 18:54:31

在 pyaudio 发行版中，test/system_info.py 展示了如何确定设备支持的采样率。请参阅从第 49 行开始的部分。

简而言之，您使用 PyAudio.is_format_supported 方法，例如


devinfo = p.get_device_info_by_index(1)  # Or whatever device you care about.
if p.is_format_supported(44100.0,  # Sample rate
                         input_device=devinfo['index'],
                         input_channels=devinfo['maxInputChannels'],
                         input_format=pyaudio.paInt16):
  print 'Yay!'

In the pyaudio distribution, test/system_info.py shows how to determine supported sample rates for devices. See the section that starts at line 49.

In short, you use the PyAudio.is_format_supported method, e.g.


devinfo = p.get_device_info_by_index(1)  # Or whatever device you care about.
if p.is_format_supported(44100.0,  # Sample rate
                         input_device=devinfo['index'],
                         input_channels=devinfo['maxInputChannels'],
                         input_format=pyaudio.paInt16):
  print 'Yay!'

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橘味果▽酱 2024-10-17 18:54:31

使用 sounddevice 模块，你可以这样做：

import sounddevice as sd

samplerates = 32000, 44100, 48000, 96000, 128000
device = 0

supported_samplerates = []
for fs in samplerates:
    try:
        sd.check_output_settings(device=device, samplerate=fs)
    except Exception as e:
        print(fs, e)
    else:
        supported_samplerates.append(fs)
print(supported_samplerates)

当我尝试这个时，我得到：

32000 Invalid sample rate
128000 Invalid sample rate
[44100, 48000, 96000]

你可以还要检查是否支持一定数量的通道或某种数据类型。
有关更多详细信息，请查看文档：check_output_settings()。
当然，您也可以使用输入设备 “noreferrer”>check_input_settings()。

如果您不知道设备 ID，请查看 query_devices()< /a>.

我认为这仍然不相关，但这也适用于 Python 2.6，您只需从 print 语句中删除括号并将 except Exception 替换为 e: 即可异常除外，e:。

With the sounddevice module, you can do it like that:

import sounddevice as sd

samplerates = 32000, 44100, 48000, 96000, 128000
device = 0

supported_samplerates = []
for fs in samplerates:
    try:
        sd.check_output_settings(device=device, samplerate=fs)
    except Exception as e:
        print(fs, e)
    else:
        supported_samplerates.append(fs)
print(supported_samplerates)

When I tried this, I got:

32000 Invalid sample rate
128000 Invalid sample rate
[44100, 48000, 96000]

You can also check if a certain number of channels or a certain data type is supported.
For more details, check the documentation: check_output_settings().
You can of course also check if a device is a supported input device with check_input_settings().

If you don't know the device ID, have a look at query_devices().

I don't think that's still relevant, but this also works with Python 2.6, you just have to remove the parentheses from the print statements and replace except Exception as e: with except Exception, e:.

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自由如风 2024-10-17 18:54:31

直接使用 Portaudio 您可以运行以下命令：

for (int i = 0, end = Pa_GetDeviceCount(); i != end; ++i) {
    PaDeviceInfo const* info = Pa_GetDeviceInfo(i);
    if (!info) continue;
    printf("%d: %s\n", i, info->name);
}

感谢另一个线程

Directly using Portaudio you can run the command below:

for (int i = 0, end = Pa_GetDeviceCount(); i != end; ++i) {
    PaDeviceInfo const* info = Pa_GetDeviceInfo(i);
    if (!info) continue;
    printf("%d: %s\n", i, info->name);
}

Thanks to another thread

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