mixer

射频电路PCB的设计技巧 & 四大基础特性

浪尽此生 提交于 2019-12-04 06:02:25
由于射频(RF)电路为分布参数电路,在电路的实际工作中容易产生趋肤效应和耦合效应,所以在实际的PCB设计中,会发现电路中的干扰辐射难以控制。 如:数字电路和模拟电路之间相互干扰、供电电源的噪声干扰、地线不合理带来的干扰等问题。 正因为如此,如何在PCB的设计过程中,权衡利弊寻求一个合适的折中点,尽可能地减少这些干扰,甚至能够避免部分电路的干涉,是射频电路PCB设计成败的关键。 文中从PCB的LAYOUT角度,提供了一些处理的技巧,对提高射频电路的抗干扰能力有较大的用处。 一、RF布局 这里讨论的主要是多层板的元器件位置布局。 元器件位置布局的关键是固定位于RF路径上的元器件,通过调整其方向,使RF路径的长度最小,并使输入远离输出,尽可能远地分离高功率电路和低功率电路,敏感的模拟信号远离高速数字信号和RF信号。 在布局中常采用以下一些技巧: 1.一字形布局 RF主信号的元器件尽可能采用一字形布局,如图1所示。 但是由于PCB板和腔体空间的限制,很多时候不能布成一字形,这时候可采用L形,最好不要采用U字形布局(如图2所示),有时候实在避免不了的情况下,尽可能拉大输入和输出之间的距离,至少1.5cm以上。 图1 一字形布局 图2 L形和U字形布局 另外在采用L形或U字形布局时,转折点最好不要刚进入接口就转,如图3左所示,而是在稍微有段直线以后再转,如图3右图所示。 图3 两种方案 2

Why doesn't my PyGame mixer play sounds,?

雨燕双飞 提交于 2019-12-03 20:21:41
问题 My PyGame mixer in 2.7 won't work with the sound option. I can make it work with mixer.music but not with mixer.sound, with mixer.sound it makes a small ticking noise and then stops. Code: import pygame pygame.mixer.init(frequency=22050, size=-16, channels=2, buffer=4096) song = pygame.mixer.Sound("song.mp3") pygame.mixer.Sound.play(song) No error, it just won't play and gives a small ticking noise. On windows 7-x64 btw. 回答1: Usually, Pygame will not play mp3 files. You could test to see if

Audio Mixing with Java (without Mixer API)

痴心易碎 提交于 2019-12-03 17:18:02
I am attempting to mix several different audio streams and trying to get them to play at the same time instead of one-at-a-time. The code below plays them one-at-a-time and I cannot figure out a solution that does not use the Java Mixer API. Unfortunately, my audio card does not support synchronization using the Mixer API and I am forced to figure out a way to do it through code. Please advise. /////CODE IS BELOW//// class MixerProgram { public static AudioFormat monoFormat; private JFileChooser fileChooser = new JFileChooser(); private static File[] files; private int trackCount; private

Service Mesh 发展趋势(续):棋到中盘路往何方 | Service Mesh Meetup 实录

陌路散爱 提交于 2019-12-02 07:41:27
敖小剑,蚂蚁金服高级技术专家,十七年软件开发经验,微服务专家,Service Mesh 布道师,ServiceMesher 社区联合创始人。 本文内容整理自 8 月 11 日 Service Mesher Meetup 广州站主题演讲,完整的分享 PPT 获取方式见文章底部。 前言 标题“Service Mesh发展趋势(续)”中的“续”是指在今年5月底,我在 CloudNative Meetup上做了一个“ Service Mesh发展趋势:云原生中流砥柱 ”的演讲,当时主要讲了三块内容:Service Mesh 产品动态、发展趋势、与云原生的关系。后来有同学反应希望部分感兴趣的内容能讲的更深一些,所以今天将继续“Service Mesh 发展趋势”这个话题。 今天给大家分享的内容有部分是上次演讲内容的深度展开,如社区关心的 Mixer v2 以及最近看到的一些业界新的技术方向,如 web assembly 技术,还有产品形态上的创新,如 google traffic director 对 Service Mesh 的虚拟机形态的创新支持。 在 Service Mesh 出道四年之际,也希望和大家一起带着问题来对 Service Mesh 未来的发展进行一些深度思考。 在正式开始分享之前,让我们先轻松一下,下面是最近流行的梗,各种灵魂拷问: 我们今天的分享内容,将效仿上面的方式

Change Mixer to output sound to in java

徘徊边缘 提交于 2019-12-01 12:26:58
I am trying to play a wav/mp3 to my virtual audio cable, I have been searching for hours but can't seem to find how to achieve this. I have been able to play sound in both formats but I can't get it to output to 'Line-1' rather than 'Speakers' Any helpful links or example code would be greatly appreciated. Radiodef To get an array of all Mixer s on the current platform, you may use AudioSystem#getMixerInfo : static void printAllMixerNames() { for(Mixer.Info info : AudioSystem.getMixerInfo()) { System.out.println(info.getName()); } } If your virtual cable is available, it will be in the array.

Change Mixer to output sound to in java

限于喜欢 提交于 2019-12-01 11:20:14
问题 I am trying to play a wav/mp3 to my virtual audio cable, I have been searching for hours but can't seem to find how to achieve this. I have been able to play sound in both formats but I can't get it to output to 'Line-1' rather than 'Speakers' Any helpful links or example code would be greatly appreciated. 回答1: To get an array of all Mixers on the current platform, you may use AudioSystem#getMixerInfo: static void printAllMixerNames() { for(Mixer.Info info : AudioSystem.getMixerInfo()) {

Service Mesh 发展趋势:云原生中流砥柱

随声附和 提交于 2019-12-01 03:46:15
Service Mesh 发展趋势:云原生中流砥柱 前言 本文内容整理自5月25日在 Kubernetes & Cloud Native Meetup 上海站发表的主题演讲,主要介绍了 ServiceMesh 最新的产品动态,分析其发展趋势和未来走向;结合蚂蚁金服的上云实践,阐述在云原生背景下 Service Mesh 的核心价值,以及对云原生落地的关键作用。 内容主要有三个部分: Service Mesh 产品动态:介绍最近半年 Service Mesh 的产品动态,包括开源项目和云厂商推出的云上服务 Service Mesh 发展趋势:根据最近的产品动态,总结 Service Mesh 的发展趋势,推断未来的走向 Service Mesh 与云原生:结合云原生,更好的理解 Service Mesh 的价值和作用 Service Mesh 产品动态 Istio1.1 发布 Istio 是目前 Service Mesh 社区最引人注目的开源项目,在今年的3月份发布了期待已久的 Istio 1.1 版本,我们来看看 Istio 最近几个版本的发布情况: 2018年6月1日,Istio 发布了 0.8 版本,这是 Istio 历史上第一个 LTS 版本,也是 Istio 历史上变动最大的一个版本; 2018年7月31日,Istio 发布了 1.0 版本,号称 "Product

Java - recording from mixer

青春壹個敷衍的年華 提交于 2019-11-30 13:00:23
问题 I have a problem connected with my previous question. I want to record audio from mixer (speakers), I'm using javax.sound. I have to set up audioFormat and I don't know what to type there :/ Using class ListMixer (which I found here -> http://forums.oracle.com/forums/thread.jspa?threadID=2198477&tstart=2), I write something like this: http://forums.oracle.com/forums/thread.jspa?threadID=2198477&tstart=2 but I don't have any info about sample rate (unknown sample rate). Program is throwing

How to mix audio samples?

僤鯓⒐⒋嵵緔 提交于 2019-11-30 05:20:10
My question is not completely programming-related, but nevertheless I think SO is the right place to ask. In my program I generate some audio data and save the track to a WAV file. Everything works fine with one sound generator. But now I want to add more generators and mix the generated audio data into one file. Unfortunately it is more complicated than it seems at first sight. Moreover I didn't find much useful information on how to mix a set of audio samples. So is there anyone who can give me advice? edit: I'm programming in C++. But it doesn't matter, since I was interested in the theory

Java - recording from mixer

二次信任 提交于 2019-11-30 05:12:05
I have a problem connected with my previous question. I want to record audio from mixer (speakers), I'm using javax.sound. I have to set up audioFormat and I don't know what to type there :/ Using class ListMixer (which I found here -> http://forums.oracle.com/forums/thread.jspa?threadID=2198477&tstart=2 ), I write something like this: http://forums.oracle.com/forums/thread.jspa?threadID=2198477&tstart=2 but I don't have any info about sample rate (unknown sample rate). Program is throwing this exception: java.lang.IllegalArgumentException: Line unsupported: interface TargetDataLine supporting