此示例显示了如何使用用户数据报协议(UDP)在数字音频工作站(DAW)和MATLAB®之间进行通信。DAW和MATLAB之间共享的信息可用于在MATLAB中实时执行有关正在更改DAW的参数的信息。
UDP是一种互联网协议的核心成员e. It is a simple connectionless transmission that does not employ any methods for error checking. Because it does not check for errors, UDP is a fast but unreliable alternative to the transmission control protocol (TCP) and stream control transmission protocol (SCTP). UDP is widely used in applications that are willing to trade fidelity for high-speed transmission, such as video conferencing and real-time computer games. If you use UDP for communication within a single machine, packets are less likely to drop. The tutorials outlined here work best when executed on a single machine.
这se System objects enable you to use UDP with MATLAB:
DSP.UDPRECEIVER
- 从网络接收UDP数据包
dsp.udpsender
- 将UDP数据包发送到网络
To communicate between a DAW and MATLAB using UDP, place a UDP sender in the plugin used in the DAW, and run a corresponding UDP receiver in MATLAB.
这dsp.udpsender
andDSP.UDPRECEIVER
System objects use prebuilt library files that are included with MATLAB.
这se Audio Toolbox™ example plugins use UDP:
Audiopluginexample.udpsender
- Send an audio signal from a DAW to the network. If you generate this plugin and deploy it to a DAW, the plugin sends frames of a stereo signal to the network. The frame size is determined by the DAW. You can modify the example plugin to send any information you want to analyze in MATLAB.
AudioplugineXample.ParametricequalizerWithUDP
- 将插件的过滤器系数从DAW发送到网络。如果您生成此插件并将其运行DAW,则该插件将发送您在DAW中调整到网络的参数均衡器的系数。这辅助板球群体
函数包含一个接收数据报的UDP接收器,并使用它来绘制您在DAW中调整过滤器的幅度响应。
步骤1:生成VST插件
从中生成VST插件Audiopluginexample.udpsender
, 使用generateAudioPlugin
function. It is a best practice to move to a directory that can store the generated plugin before executing this command:
generateAudioPluginAudiopluginexample.udpsender
........
生成的插件保存到您当前的文件夹并命名udpsender
。
步骤2:开放DAW,使用适当的环境变量集
要运行MATLAB外的UDP发件人,您必须从设置适当的环境变量的命令终端打开DAW。设置环境变量使已部署的UDP发件人在MATLAB中使用必要的库文件。要了解如何设置环境变量,请参见系统的特定教程:
设置环境变量后,从同一命令终端打开DAW,例如在Windows系统的示例终端中。
步骤3:接收和处理音频信号
一个。在DAW中,打开生成的udpsender
文件。
b。在MATLAB中,运行此功能:辅助pppluginreceiver
音频信号显示在DSP.Spectrumanalyzer
用于分析。
1. Follow steps 1-2 from将音频从DAW发送到Matlab,更换Audiopluginexample.udpsender
和AudioplugineXample.ParametricequalizerWithUDP
。
2.接收和处理过滤系数
一个。在DAW中,打开生成的parameterequalizerwithudp
文件。插件显示名称是parametriceq
。
b。在MATLAB中,运行此命令:辅助板球群体
这辅助板球群体
功能使用DSP.UDPRECEIVER
要接收滤波器系数,然后显示幅度响应60秒。您可以修改代码以延长或减少时间。绘制的幅度响应对应于您在DAW中调整的参数均衡器插件。