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调音台与台式机连接有杂音
UID：1382613
在线时间0小时
M币-14专家0
本帖被 mydigit 从 MyDigit学堂 移动到本区()
我的调音台输出给电脑PC机，两边设备单独使用都没有问题，音质都没问题，连接后电脑录制的有很大的杂音这是为什么？调音台的所有输出都试过了，还会有杂音。但是调音台给笔记本却没有杂音。怎么解决求助各位大神
UID：822881
在线时间6935小时
M币2213专家11
插头接触良好吗？换个信号口输入试试。
UID：527601
在线时间1656小时
M币4884专家5
这个主要是调音台和计算机的“地”电位不同，引入了共模干扰造成的。最简洁的方法是使用1个1:1的音频隔离变压器，如果对频响要求严格则用一个1:1的变压器给调音台供电。
UID：260006
在线时间586小时
M币7329专家2
电脑开关电源干扰
UID：793827
在线时间942小时
M币1144专家1
有接地线吗？没有的话，接一根就行了。
UID：805500
在线时间4412小时
M币4554专家85
很简单，电源没有地线。
UID：794068
在线时间25369小时
M币80917专家378
还是接地有问题，仔细检查一下
UID：668807
在线时间1027小时
M币1374专家3
二楼说的对，他说的那玩意叫共地隔离器，X宝上一搜一大片
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助理工程师
最近公司网站发布稿件很慢一篇稿件要发布10分钟以上长成功，所以怀疑是不是 oracle数据的问题。就在百度上面百度了个awr报表的操作。查看了下cpu负载过高。麻烦大家帮忙看看我该怎么去查这个sql。谢谢哪怕指点思路就成。
Top 5 Timed Foreground Events
EventWaitsTime(s)Avg wait (ms)% DB timeWait ClassDB CPU 1,173,454 99.91 Disk file operations I/O641,8839,754150.83User I/Olog file sync475,6413,67180.31Commitdirect path read196,8542,335120.20User I/OSQL*Net break/reset to client1,922,5381,81110.15Application
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SQL ordered by CPU TimeResources reported for PL/SQL code includes the resources used by all SQL statements called by the code.%Total - CPU Time as a percentage of Total DB CPU%CPU - CPU Time as a percentage of Elapsed Time%IO - User I/O Time as a percentage of Elapsed TimeCaptured SQL account for 53.0% of Total CPU Time (s): 1,173,454Captured PL/SQL account for 4.8% of Total CPU Time (s): 1,173,454CPU Time (s)ExecutionsCPU per Exec (s)%TotalElapsed Time (s)%CPU%IOSQL IdSQL ModuleSQL Text347,144.73341,1811.0229.58347,366.4199.940.00[url=file:///C:/Users/Administrator/Desktop/awrrpt_1_.html#9r037qkfrv33y]9r037qkfrv33y[/url]JDBC Thin ClientSELECT * FROM ( SELECT * FROM ...32,309.73310104.222.7533,693.3495.893.97[url=file:///C:/Users/Administrator/Desktop/awrrpt_1_.html#d15cdr0zt3vtp]d15cdr0zt3vtp[/url]Oracle Enterprise Manager.Metric EngineSELECT TO_CHAR(current_timesta...28,251.70106,9500.262.4128,277.3599.910.00[url=file:///C:/Users/Administrator/Desktop/awrrpt_1_.html#8nggx918mnu3p]8nggx918mnu3p[/url]JDBC Thin ClientSELECT * FROM ( SELECT A.* FRO...20,631.745,8663.521.7621,672.2195.204.49[url=file:///C:/Users/Administrator/Desktop/awrrpt_1_.html#20nwzjgzv67ch]20nwzjgzv67ch[/url]JDBC Thin Clientselect SUBTASK_HISTORY_ID, SUB...19,662.62141,404.471.6820,120.2997.730.08[url=file:///C:/Users/Administrator/Desktop/awrrpt_1_.html#b6usrg82hwsa3]b6usrg82hwsa3[/url]DBMS_SCHEDULERcall dbms_stats.gather_databas...19,059.955,8703.251.6219,080.6699.890.00[url=file:///C:/Users/Administrator/Desktop/awrrpt_1_.html#9tg17ryq5x9dv]9tg17ryq5x9dv[/url]JDBC Thin Clientselect TASK_HISTORY_ID, TASK_I...18,217.056,3162.881.5518,279.9699.660.03[url=file:///C:/Users/Administrator/Desktop/awrrpt_1_.html#6c23x8vrfup0t]6c23x8vrfup0t[/url]JDBC Thin Clientselect TASK_ID from CMS_PUBLIS...15,415.4116,0080.961.3115,441.1499.830.00[url=file:///C:/Users/Administrator/Desktop/awrrpt_1_.html#8xzydgbajk40t]8xzydgbajk40t[/url]JDBC Thin ClientSELECT * FROM ( SELECT TITLE, ...15,051.3262,508.551.2815,208.8998.960.14[url=file:///C:/Users/Administrator/Desktop/awrrpt_1_.html#59v4zh1ac3v2a]59v4zh1ac3v2a[/url]DBMS_SCHEDULERDECLARE job BINARY_INTEGER := ...13,625.1962021.981.1613,653.5299.790.00[url=file:///C:/Users/Administrator/Desktop/awrrpt_1_.html#a8j39qb13tqkr]a8j39qb13tqkr[/url]emagent_SQL_oracle_databaseSELECT :B1 TASK_ID, F.FINDING_...[url=file:///C:/Users/Administrator/Desktop/awrrpt_1_.html#22]Back to SQL Statistics[/url]
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SQL ordered by User I/O Wait TimeResources reported for PL/SQL code includes the resources used by all SQL statements called by the code.%Total - User I/O Time as a percentage of Total User I/O Wait time%CPU - CPU Time as a percentage of Elapsed Time%IO - User I/O Time as a percentage of Elapsed TimeCaptured SQL account for 62.2% of Total User I/O Wait Time (s): 12,382Captured PL/SQL account for 1.9% of Total User I/O Wait Time (s): 12,382User I/O Time (s)ExecutionsUIO per Exec (s)%TotalElapsed Time (s)%CPU%IOSQL IdSQL ModuleSQL Text5,139.15315,3940.0241.515,848.8298.1487.87[url=file:///C:/Users/Administrator/Desktop/awrrpt_1_.html#459f3z9u4fb3u]459f3z9u4fb3u[/url] select value$ from props$ wher...1,338.793104.3210.8133,693.3495.893.97[url=file:///C:/Users/Administrator/Desktop/awrrpt_1_.html#d15cdr0zt3vtp]d15cdr0zt3vtp[/url]Oracle Enterprise Manager.Metric EngineSELECT TO_CHAR(current_timesta...972.035,8660.177.8521,672.2195.204.49[url=file:///C:/Users/Administrator/Desktop/awrrpt_1_.html#20nwzjgzv67ch]20nwzjgzv67ch[/url]JDBC Thin Clientselect SUBTASK_HISTORY_ID, SUB...169.568,9360.021.374,380.6599.163.87[url=file:///C:/Users/Administrator/Desktop/awrrpt_1_.html#6gvch1xu9ca3g]6gvch1xu9ca3g[/url] DECLARE job BINARY_INTEGER := ...69.64315,5770.000.561,467.9399.894.74[url=file:///C:/Users/Administrator/Desktop/awrrpt_1_.html#4vs91dcv7u1p6]4vs91dcv7u1p6[/url]OMSinsert into sys.aud$( sessioni...45.8976.560.37363.7689.2812.62[url=file:///C:/Users/Administrator/Desktop/awrrpt_1_.html#dcjjq8h60jd7h]dcjjq8h60jd7h[/url]exp.exeSELECT /*+NESTED_TABLE_GET_REF...21.2363.540.1715,208.8998.960.14[url=file:///C:/Users/Administrator/Desktop/awrrpt_1_.html#59v4zh1ac3v2a]59v4zh1ac3v2a[/url]DBMS_SCHEDULERDECLARE job BINARY_INTEGER := ...19.98141.430.16449.3796.374.45[url=file:///C:/Users/Administrator/Desktop/awrrpt_1_.html#6mcpb06rctk0x]6mcpb06rctk0x[/url]DBMS_SCHEDULERcall dbms_space.auto_space_adv...15.17141.080.1220,120.2997.730.08[url=file:///C:/Users/Administrator/Desktop/awrrpt_1_.html#b6usrg82hwsa3]b6usrg82hwsa3[/url]DBMS_SCHEDULERcall dbms_stats.gather_databas...9.837380.010.082,397.7099.910.41[url=file:///C:/Users/Administrator/Desktop/awrrpt_1_.html#4q36d3kyfwta7]4q36d3kyfwta7[/url]JDBC Thin ClientSELECT DISTINCT CHANNEL_NAME F...[url=file:///C:/Users/Administrator/Desktop/awrrpt_1_.html#22]Back to SQL Statistics[/url]
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高级工程师
引用:原帖由 Ydebin 于
18:23 发表
SQL ordered by CPU TimeResources reported for PL/SQL code includes the resources used by all SQL statements called by the code.%Total - CPU Time as a percentage of Total DB CPU%CPU - CPU Time ... 把你的AWR报表整体上传
这个报表应该很快能执行完毕，你看看是不是有锁等啊。另外你看报表得CPU占用率，不如直接去看看提交报表时，那个进程得CPU占用率高，是archn&&还是dbwr
这样在做确定2被浏览136分享邀请回答0添加评论分享收藏感谢收起调音台实验指导_百度文库
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