Audio line-in analog port - no sound

I have an MP3 player plugged into the audio line in port. I cannot hear the audio. I have selected the correct input config (audio line in). I have all my volumes and mutes in the correct positions. I can see the audio is modulating the VU meter yet no sound comes out. I can also play music just fine from iTunes or other files on the computer. What is the problem here? Does anyone have any suggestions?
Telebob in Texas
Imac G5 Mac OS X (10.4.4)

Good Point. I am using Sirius. I do realize you can use their streaming audio but there is less info and control. I have the home adapter kit and just thought when not in the car.....
Shouldn't pumping the audio out from the radio go through the audio input on the iMac?
Also, streaming isn't all that perfect. Rebuffering, interrupted connections, etc. uses bandwidth and processor resources or so I think. I don't wish to record just play back. I know I have used the audio input on my G3 iMac with a video camera but perhaps that was because I was recording therefore the sound monitor was turned on. I just don't remember. I really think I have a setting or box checked wrong somewhere.
Thank you for your response. No matter how much info is posted on a support site it never compares to talking with other users.
I'll keep digging. Have a nice weekend.
john

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Audio Line-In Input: Not Reading Sound

So here's my problem:
I tried recording some stuff I was doing in my DAW using Quicktime's Audio Recording option. My understanding is that I simply start a new recording, choose my input device, and start recording (by which I chose "Built-In Input: Line In"). I chose that option thinking, "Oh hey, I obviously want the highest quality sound for a recording so my friends can hear what I'm doing...why not have them hear what I'm hearing in my headphones?" Turns out, after I listened back to the recording....NO SOUND. I triple checked but the audio clip had no sound...just silence. Then, I went to system preferences, checked to make sure the correct Audio Input was selected...yes: "Line In: Audio Line-in port," NOT "internal microphone." Ok...so what now?
Then I went into the AUDIO MIDI SETUP in Utilities to make sure everything was okay there. Everything's fine...except the master volume on my Built-in Input is set to "0." The left and right faders are at a moderate level but the master is simply 0 (and it won't let me adjust it...it's just grayed out). The weird thing is, when I go back to system preferences, I have the Built-In Input level turned up. Why are these two levels different if they're the same input? Is this why I'm getting no sound when trying to record things like: music coming from my DAW, or simple audio tracks on my mac, or other recordings? I should emphasize: I AM hearing sound through my output, BUT I am NOT able to record that sound with a recording device. I've tried multiple things: Line In application, Audacity, restarting comp, changing to audo interface, checking DAW settings, etc. Why is my Line-In Input getting no signal? Thanks guys!
My specs:
http://support.apple.com/kb/sp644

Couple of things to check, you say you have selected line in ok, are you sending an analog signal to the line in port?(It needs to be analog to be seen) If you are, when you open QT, under file click new audio recording, then also click the little white triangle on the upper right and make sure that it is set to line is a well. You need to click the red square to begin recording. Also check the Audio MIDI Set Up is configured as in the 2nd screen shot

Audio: Line level Analog Out

I am trying to connect a Mac Mini (intel) to a regular Samsung HD LCD TV. DVI-to-HDMI works well for the video, but in order to get the audio, I am looking to get an analog, *line-level signal out* of the mini.
Any idea of how to achieve this?
TV audio input is RCA (red/white plugs). All the cables I have at the moment, seem to pull *headphone level* from the mac mini.
Help and pointers are much appreciated. Thanks // pascal

Your experience is a little unusual, and in fact if anything it should go the other way, since the output voltage for headphones is a little above the line-level typically used for pre-amped signals for which RCA inputs are commonly used, Thus if anything, the volume from the mini via the TV should be higher than normal TV channels.
All that being said, that assumes you have the volume control on the mini turned up of course! I typically leave mine at maximum (this is set in the Sounds preference pane, though I'm sure you know that!) and thus control the overall volume via the TV.
If your mini's volume is already a max, then test the output with a pair of headphones (or iPod earpieces etc) to check the output level is actually what it should be. If it's too low, there's a problem in the mini or with MacOS, if it's normal, then there's a problem with the audio cable or the TV. In the latter regard, I'm not familiar with the specific TV you have, but you might find you need to set the correct input for the video input you are using.

Audio line in for ipad

I would like to use the iPad as a digital recorder. Is there an accessory to adapt an audio line in to connect a sound board to the iPad? I've done some looking, but have not been able to find anything.

Might be of some interest to you:
http://touchmic.com/tag/ipad-microphone/
and this:
http://www.synthtopia.com/content/2010/04/03/studiotrack-turns-an-ipad-into-an-8 -track-recorder/

Audio line-in port - input level shows sound but nothing from speakers

I have a Genus DAB radio attached to the Audio line-in port on my Macbook running Leopard 10.5.3. The input level meter shows sound but nothing is heard through the speakers.
I have tested my headphones and connected the radio up to a PC and all is well, ca anyone suggest a fix for this? (I have seen the same issue elsewhere on this forum with no replies).
Many thanks,
Gary

What audio application are you using to pass the audio through the input to the speakers/headphones?
-Doug

Connect iPod to MacBook Pro audio line-in port?

My 1st Gen iPod's Firewire port fried recently; it still delivers a charge to my iPod but won't allow it to mount. I can still listen to music with the headphone jack.
What sort of cable can I use to attach my iPod to the audio line-in on my Macbook Pro?

I also have this problem but with a slightly different twist..
I was using my plantronics (old ms gamevoice headset) with 10.5.2 and it worked, then installed the m-Audio Firewire Audiophile beta drivers and neither the audio-in or the m-audio audiophile line-in cause any VU-meter response (nor input) whereas the standard inbuilt microphone does.
After uninstalling the m-audio drivers the situation is still the same.
Oddly - if I plug in the headphones into the line-in (rather than microphone) then speak into them I actually get input audio (and VU-meter response) through the MBP's audio-in.
So the story about no power is used (hence the headphones create enough to register the sound) sounds about true... very annoying as I thought my old headset had died and went out and bought a new one.. that still doesn't explain the audiophile input issues..
Now I fully expect both companies to point fingers at each other.. I don't care - just get it fixed please.

What is the "Audio line in" port for?

I have a microphone headset but plugging the mic cord into the audio line in port does nothing. Similarly, when I tried plugging a cable from the "tape out" of my audio amplifier into that port for dubbing purposes, nothing happened. In both cases I can achieve what I want using an iMic and a USB port. So what's the audio line line port for? How can I use it?

Check your Sound settings in system preferences and audio midi set-up, Brian. It may be that you have it set to accept sound in through USB at present. Another possibility is that the port has "stuck" on "optical input".
Cheers
Rod

Audio line-in buzzing sound

hello guys ! i just bought a macbook last month and currently still learning on how to get used to mac.as a guitarist im very exited to try out the GarageBand.after i plug in the audio jack from my guitar to the audio line-in port,i found out that there is no sound from the strings of my guitar.there is only the buzzing sound.the input level also shows a not static level instead of steady level.what do i have to do friends ??
forgive me of my language as english is not my main language
thanks !!

Hello,
Most likely, the output from your guitar is too low and therefore sounds like silence from your Macbook. You will need to amplify your guitar output to work with your MacBook. Since you are a guitarist, you might already have the right equipment--connect your guitar to a preamp, and then to the macbook. If you don't have a preamp, I think you can plug your guitar into a regular amp, and then connect that to the macbook.
* There are two kinds of input signals, distinguished by levels. Commonly, they are called "mic-level" and "line-level." Most guitars pickups will output mic-level, which needs to be amplified to line-level to work with computers. MacBooks only accept line-level inputs.
http://docs.info.apple.com/article.html?artnum=303722
http://en.wikipedia.org/wiki/Line_level
I have used an acoustic guitar w/ preamp with Garage band on macbook, so I can tell you that it definitely works.
Rock on!

No sound with input to audio line in

All of my other audio works fine. I can play CDs and video files like AVI and sound is perfect. I am using the Apple pro speakers. You can't get audio from the line-in on the speaker jack either. If you go to the audio prefs it shows line in and port is audio-line in port. The input level meter shows activity that looks like the audio currently playing. If you unhook the audio cable (monaural) the sound level meter goes to zero. The output shows external speakers and port is built-in audio. I am trying to listen to the TV audio while I watch the composit video on my monitor. The video part works perfectly. It is like the audio in is not connected to the audio out. Any ideas??
Bob

I was a bit confused by your description of what is going on with your system, so I'm sure you;ve already done some of this stuff. Having said that, here are a few suggestions...
1. Did you change anything in the Audio MIDI Setup application? It is located in: Applications: Utilities
2. Did you hit the Mute button on your keyboard?
3. Did you plug the cable into the correct port on your Mac?
4. Did you double-check your setting in System Preferences: Audio? Input and Output?
5. Are you coming out of the Audio Out on your sound source?
6. Have you tried any other external audio source with success?
G5 dual core 2.5 ram Mac OS X (10.4.3)

Audio line in no sound

Hooked up an external radio to my line in. No sound from the speakers. Went to System Preferences>Sound to check things out.
Output is set to Internal Speakers
Mute box is unchecked
I can get system sounds, cd playback and internet audio just fine
Input shows Line in as Built-in Input
Input volume set all the way up
Input level meter is reading and showing input just fine
Mute box is unchecked
I tested the setup on my pc laptop by unplugging the connector from my iMac and inserting it into the line in connection port on the pc. Works fine on the pc.
Anything else I can do? I think I have a warranty issue, but I don't want to contact Apple unless you intelligent people agree.

Hi jtaggart2
To pass audio from input to output you'll need something like LineIn.
http://www.macupdate.com/info.php/id/11333/linein
Dennis

Can't get sound to play using audio line in

I am trying to play audio from my iPhone by connecting mini plug cable to the headphone jack and the audio line-in mini plug. The input level indicator in System Preferences > Sound is showing that audio is playing but I don't hear sound. I do have sound playing through my Mac Pro with iTunes, steaming audio/video, etc., so I know it works. Any ideas how I can get sound to play audibly using line-in?

Another option not involving any additional software - see:
http://www.insanelymac.com/forum/topic/87046-play-line-in-through-macbook-pro-in ternal-speakers/
Just came across this problem myself (10.8) and that solution works great - just open Quicktime, there under File: choose a "new audio recording". In the upcoming controller switch up the volume.
Weard that it works this way but nowhere else in the sound System Control panels ...

Faulty audio line-in port?

Hi, I've just bought a 'Monster iStudioLink' lead to record a guitar onto my Mac using Garageband, but something isn't working!
I've gone into System Preferences to check if there is a sound input and the iMacs internal mic is working fine but theres no audio line-in signal.
Does anybody know if there is a way that I could check if the line-in is faulty or am I doing something wrong?
Thanks

First make sure you are plugged into the
imput jack not the headphone jack
(Ive done that many times)
If you are going direct from your guitar
you may need to go through a pre amp first.

Why can't I get stereo sound recording to iMovie through audio line in?

I am recording some keyboard music from a digital keyboard (Yamaha pf85) into iMovie HD 6 on my laptop through the audio line in. I have connected Output I from the keyboard to the audio line in using a mini jack adapter. This is supposed to record the music in Mono, but it will only play back on the left side of the spectrum. There is no right side sound at all. The keyboard has twin outputs, so I have also tried connecting Outputs I and II to the laptop's line in, using a twin mini jack adapter, but the music still only plays back on the left side. What's happened to the right side?
I have transferred the movie to my desktop Mac (PowerPC G4 with OS 10.4.11) but I get the same problem.
I've tried exporting the movie to QuickTime, but still the same problem.
What am I doing wrong? How can I record/playback the sound on both sides of the spectrum?

Thanks for these suggestions, which are blinding but have not solved it.
1) All cables OK and fully inserted.
2) I tried recording a voice over into iMovie using a USB mic/headset and that was in mono but played back through both channels, so laptop and iMovie are OK recording with USB.
3) I tried recording from the keyboard into iMovie and QuickTime on the laptop in three different ways through line in: first using both Outputs, then using Output I only and finally using Output II only. On all three occasions, the sound played back on the laptop through the left channel only. The keyboard itself has two inbuilt speakers and a headphone socket and both are providing mono sound through left and right channels, which suggests it's not faulty.
I then tried recording sound only from the keyboard into Quicktime on my desktop Mac, using the same cables and adapter. Left channel only.
I guess this means either the adapter is faulty or it's something to do with the way my keyboard outputs sound. I'll try your other suggestion. Or maybe I just need a hardware interface to route the separate channels. That seems excessive for what I want to achieve.

Am trying to record a basic guitar track while I sing along. I don't want my vocals to be recorded at the same time but the internal mic seems to be picking up the vocal and guitar sounds. I tried System Preferences, Sound, Line In - Audio Line Input.

I am trying to record a basic guitar track while I sing along. I don't want my vocals to be recorded at the same time but the internal mic seems to be picking up the vocal and guitar sounds. I tried System Preferences, Sound, Line In - Audio Line Input. It seems to be a common problem in Garageband for the Mac, ipad and iphone.

for me it turned out that the jack into the iMac was loose. Once I fiddled with it everything worked okay

Audio line out port (Apple iPad Dock Connector) not working Iphone 4 os 4.2

For my new iphone4, the audio line out port (Apple iPad Dock Connector)is not working. Both using a cable to mini jack (3,5 mm) or in dockingstation.
I'm using OS 4.2.
IS this a bug?
Thanks
Hans

I just came back from the Apple store. My iPhone4 DOES have a working line out when plugged into a Apple name brand dock connector. I don't know why my SendStation refuses to work only with the iPhone4 yet works with iPods, etc..
Solution? I'm buying an Apple iPod dock connector for home and will try to find something with line out for the car - Apple says they do not make one.

Audio line-in analog port - no sound

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