do you think line-in would be the best option for mac recording? thanks Michael > On 10 Feb 2015, at 9:01 am, 'Chris Blouch' via MacVisionaries > <[email protected]> wrote: > > The earlier Macbooks had headphone out and line-in. line-in is probably the > most common as mic-level preamps are delicate noise-prone things, probably > not something Apple would want to spend money on for the handful of folks who > would actually use it. For those who do care you can get all kinds of XLR mic > to USB preamp boxes. I know it's a common issue for folks who came over from > the PC which had both a line in and mic in only to discover the mic no longer > worked on the mac. Even then, cards like the SoundBlasters had a goofy 5 volt > 'phantom power' so those mics wouldn't work on any normal sound equipment > either. They were PC-only. Some mics do require power to operate such as > condensor or ribbon mics and that is supplied over the same wires. This is > known as 'phantom power' and is usually about 48v. So if you want to hook up > one of those nice mics your USB adaptor will need to also supply phantom > power. I like the Art Dual Pre which has to XLR/1/4" inputs which can be > adjusted to handle everything from Mic to line inputs and also can supply > phantom power. > > http://www.bhphotovideo.com/bnh/controller/home?O=&sku=615405&Q=&is=REG&A=details > > CB > > On 2/9/15 4:26 PM, Michael Marshall wrote: >> hey, >> thanks for the stuff on electrical interference. >> USB devices are particularly prone to interference i have found. >> This is the one major mistake that Apple have made. All maxed should have >> three Jack's microphone, headphones and line-in i believe. >> Michael >>> On 10 Feb 2015, at 8:10 am, 'Chris Blouch' via MacVisionaries >>> <[email protected]> wrote: >>> >>> Related to this, there are four audio electrical levels. Mic levels are >>> tiny signals that come out of a mic and usually need to go through a >>> pre-amp before they can become usable 'line level' signals. Line level is >>> typically for signal routing such as patching the audio output from a DVD >>> player to the line input on your Mac. Next up is headphone which is a much >>> stronger signal as it's going to drive physical movement of something to >>> make sound waves in your ears. Last is speaker levels which, like >>> headphones, range from a few watts to thousands to drive room or stadium >>> filling speakers. >>> >>> All that is to say, if your TV output is for headphones, direct connecting >>> it to the line input of your Mac may give distorted sound. It shouldn't >>> hurt anything but you'll know it when you hear it. Most modern TVs have RCA >>> output jacks (or something digital on newer sets) which would be line level >>> and a better source for recording. If not then you'll need something called >>> a "direct box" which takes a headphone level input and generates a mic >>> level output which you can then run to a standard mic pre-amp to record. I >>> have a Mac-mini headphone output going to one of these to run it into a >>> Mackie mixing console. >>> >>> The last bit it hum. This can be any number of things including bad cables, >>> ground loops and picking up interference from power lines. If it's a low >>> pitched humm that might be 60-cycle interference as alternating current >>> flips polarity 60 times a second in the US and 50 in many other countries. >>> In the case of a ground loop, you can google the explanation but it can >>> sometimes be when two devices are on two different power circuits. >>> Sometimes as little as plugging both devices into the same circuit can make >>> that go away. The aforementioned direct box can also have a 'ground lift' >>> switch which can eliminate the buzz in some cases. If it's from >>> interference, the only solution is to move the cables around to try and >>> make it go away or use better shielded cables. >>> >>> Hope this helps. >>> >>> CB >>> >>> On 2/9/15 3:49 PM, Tim Kilburn wrote: >>>> Hi, >>>> >>>> On a Mac, the headphone jack doubles as a line-in jack. You should be >>>> able to go direct using 3.5 to 3.5 from the out on your TV to the jack on >>>> the Mac. Using an app like Audio Hi-Jack Pro would do the recording for >>>> you nicely. >>>> >>>> Later... >>>> >>>> Tim Kilburn >>>> Fort McMurray, AB Canada >>>> >>>> On Feb 9, 2015, at 12:34, Michael Marshall <[email protected]> >>>> wrote: >>>> >>>> hey all, >>>> i have a TV with a 3.5MM headphone jack witch i used to connect to the >>>> mike port on my windows computer and record the sound. >>>> on the mac i have run into some significant difficulties with this. >>>> Obviously the Mac has no dedicated microphone jack witch can be overcome >>>> with the iMike USB interface witch i have got. this has a mike jack so i >>>> thought i would be fine. >>>> The main problem that I am having is that on that and any other computer a >>>> lot of USB recording devices including this one have an unpleasant buzzing >>>> sound. I have found this problem over multiple systems and multiple USB >>>> devices. My theory is that it is electrical interference between the >>>> computer and the USB interface. >>>> what i would like to know is this, is there a way to use the 3.5MM >>>> patching cable connected to the headphone port on my television to somehow >>>> Connect to the Mac without USB? because i'm not getting the best Sound >>>> with my current configurations. >>>> thanks for any help on this. >>>> Michael >>>> >>> -- >>> ¯\_(ツ)_/¯ >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "MacVisionaries" group. >>> To unsubscribe from this group and stop receiving emails from it, send an >>> email to [email protected]. >>> To post to this group, send email to [email protected]. >>> Visit this group at http://groups.google.com/group/macvisionaries. >>> For more options, visit https://groups.google.com/d/optout. > > -- > ¯\_(ツ)_/¯ > > -- > You received this message because you are subscribed to the Google Groups > "MacVisionaries" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/macvisionaries. > For more options, visit https://groups.google.com/d/optout.
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