Conveting to AAC at a higher rate

I've read that some people import their music in the AAC format at a higher rate than 128 -- closer to 200. How do you do that? The highest choice on the iTunes software in AAC is 128.

Nevermind, I figured it out.

Similar Messages

  • "high-quality" of 128 kbps versus higher rates

    In a previous discussion a user was asking re difference between different bit
    rates one answer clearly expressed dissatisfaction with 128 kbps for music such as instrumental and for music that is intended for streaming to a good stereo.
    wondering if other users have a similar experience -- I am in the process of
    importing a huge number of files and I wonder if its worth going to the higher
    rate for all of my favourites.
    I have a lot of space at the moment on my hard drive but I don't want to waste it if I don't get much improvement in quality. Unfortunately I can't test
    it right now because I don't have a decent stereo system yet.

    This was originally posted by the incredible Sparky the wUnderdog with help from MacMuse:
    As a general principle, you can fit more CD's on your iPod if you encode at lower bitrates (making smaller files), but at the cost of audio quality. Apple Lossless promises to capture all the data on the original CD (thus preserving quality) but coded so the file takes half the space. MP3 and AAC (an implementation of variable bit rate MP4) both eliminate some of the information on the CD in order to compress the digital recording into ever smaller files--the lower the bitrate, the smaller the file, but smaller files mean more information lost and consequent poorer sound quality.
    AAC files ripped in iTunes certainly sound better than its MP3's, with audio quality close to the best LAME MP3's at higher bitrates. With the type of music I listen to most often, sound quality declines substantially as bitrates fall below 256kbps, but LAME or AAC @ 256kbps sounds pretty darned good, and at 320kbps LAME alt-preset-insane is amazingly faithful to the original. However, many users claim that with the music they listen to they can't hear the difference between 192 or even 128 kbps files and the original CD source, so they naturally choose lower bitrates to fit more "songs" on their iPods.
    CDs take approximately 10MB per minute of music; Apple Lossless takes 5MB/minute; LAME insane takes 2.5MB/min; AAC or MP3 at 256kbps take 2MB/min; and iTunes Store files (AAC@128kbps) take 1MB/min. At these rates, a 20GB iPod (really 18.6GB) can hold anywhere from 30 hours to over 300 hours of music. (iPod marketers express this potential playback capacity as "songs," figuring 4 minutes per song--thus 300 hours at 128kbps = 4500 "songs.") You will need to listen to samples ripped with different bitrates and codecs to determine the optimum tradeoff point for you between quality and quantity. It's worth taking some time to do this at the start as it sure beats reripping everything in your collection 2 or 3 times to get it right later.
    So far as convenience goes, nothing beats iTunes's one-step process. To change bitrate as you import from CD, go to the iTunes menu>Preferences, select the Importing tab, choose AAC or MP3 encoder in the "import using" selection box, then choose "Custom" in the "setting" box, and the window permitting bitrate selection will pop up. If you choose iTunes MP3 encoder, at least use VBR (variable bit rate) to maximize the sound quality. (VBR increases sample size as data complexity increases.)
    If you would prefer LAME MP3's, fear not, for the easy-to-use CDex ripping software is a free download and requires only one simple extra step to get the files into iTunes for transfer to your iPod. Now if AAC sound quality is comparable to LAME MP3, you might wonder why you should even consider LAME: Because of portability to other devices. At present, hardly anything but iPods can read AAC's or Apple Lossless, but almost everything reads MP3's. So if you plan to burn CD's of your compressed files for playback on your home or car CD player (for instance), it would be wise to choose MP3.
    One other consideration specific to the iPod- It has a 32MB cache (If you don't know what a cache is, read the last paragraph of this page: iPod + iPod Mini- Batteries). Keep individual file sizes below 25 MB as the rest of the 32 MB memory holds the iPod's Opperating System. If you choose a compression rate that results in large files (i.e. Lossless), then the cache won't hold very much 'music' and the hard drive will have to spin up frequently to fill it, and that will shorten your battery life somewhat.
    Edited by The Mimico Kid

  • How does high rate data aquisition work?

    hi, i'm interested in understanding how data can be remotely communicated at high rates as required in impact measurements.

    Hi vichu,
    Have you considered using a Wireless Sensor Network (WSN)?  From what I understand, a WSN is made up of components that combine a transducer, an A-to-D Converter (ADC), and a wireless transceiver to send the data back to a central location.  Although National Instruments does not make a wireless network, I know that LabVIEW can easily integrate with several of them, usually through database or VISA communication.  WSNs can also be used in parallel with NI hardware, such as FieldPoint or PXI.  I can't really give you any detailed specifications on a WSN system, but it sounds like something like that might work for your application.  At the very least, it's a starting point worth looking into.
    Thanks,
    Justin M
    National Instruments

  • DataGrid high rate insert rows

    Hi everyone,
    I'm working in a project where we have a high rate messages (like 2-3k per second) . We use Java on server side, BlazeDS and Flex.
    We have a problem on flex side, the messages are insert on a DataGrid where we just show the last 1k messages, after the 100k messages passed through to the application, the datagrid start to refresh slower than before.
    Do you know how can i solve this problem?
    I executed the profiler and i saw that we don't have memory leaks
    Thanks in advance.

    sorry if i sound dense but i am picking up on the phrase "but i never tried to increase the rate "
    i don't know anything about your architecture but are you cramming data back in some forced rate ?  are you force streaming ? what exactly are you doing  !!
    that poor flash player sounds overwhelmed.
    Date: Thu, 28 Apr 2011 10:05:12 -0600
    From: [email protected]
    To: [email protected]
    Subject: DataGrid high rate insert rows
    There are 7 columns and the messages are around 200 bytes each, this means that the 200 bytes are split in the 7 columns.
    Those messages are encapsulated in an object Message inside of which there are MessageFields that have two properties, tag and value.
    Initially i sent 2.5k message per second but i never tried to increase the rate while the message were been delivered, when i resolve this issue i am going to try that.
    At the begin (with 2.5k per sec) the refresh rate is quite good (almost realtime), i mean that the datagrid refreshes the sequence number of the messages really fast, each second i saw the sequence number increase in 2.5k.
    After the first minute the datagrid starts to collapse and it refreshes every few seconds, like 5 seconds for example, and once its refreshed the sequence number increases in 5 * 2.5k, so the message are coming at the rate.
    Regarding the use of cpu i underestimated that point, i was focus on the memory usage but i've showed that flash plugin recently it's between the first 3rd process and sometime took the 1st place.
    How i can reduce the use of cpu?
    >

  • Resample data at a higher rate

    I need to resample data at higher rate. I was able to use matlab interp function to interpolate my data. Bellow is the description of the matlab function. Is there a function or vi like this in labview.  My data is in the form of a .dat file. I tryed using the interpolate 1D array function in labview but this does not work.
    INTERP Resample data at a higher rate using lowpass interpolation.
        Y = INTERP(X,R) resamples the sequence in vector X at R times
        the original sample rate.  The resulting resampled vector Y is
        R times longer, LENGTH(Y) = R*LENGTH(X).
    Mark Mutton
    Electrical Engineer

    Hello
    In tools palette> analyze > waveform conditioning  you have
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    Hope it helps
    Alipio
    "Qod natura non dat, Salmantica non praestat"

  • Re-ripped content and uploading higher rate version

    I have been re-doing albums which haven't been matched and which have been ripped originally at 128kbps. I have re-ripped at a higher bit rate. How do I tell whether itunes has done what it should have done and uploaded the replaced tracks with the higher bit rate version? Some of the re-ripped tracks also matched when they hadn't before. Additional cds added after itunes match enabled do get ripped then matched or uploaded at the higher rate. The 'run itunes match' doesn't seem to make it change anything.
    The match system has mostly been painless apart from one matched track failing to download of 3500 matched ones. How do I report a failed download or is it done automatically?
    There isn't a view option to see icloud bit rate to distinguish between versions.
    Is the easiest way to delete the re-ripped album with 'delete from cloud' and then drag it back in from the trash if it hasn't uploaded the better version automatically?

    Ok, so to ensure that you have the higher quality Song uploaded:
    1.  Copy your higher quality Songs from iTunes to local folder;
    2.  Delete Songs in iTunes, including 'delete in iCloud' option;
    3.  Allow 6-12 hours for iTunes Match servers to synchronise (ensuring original really has gone from iCloud);
    4.  Turn iTunes Match off;
    5.  Import Songs from folder;
    6.  Turn iTunes Match on - allow it to complete the 3-step process.

  • HT3964 Fan Running at a high rate.

    I have a 17" Macbook Pro 2011 and the fan is running at a high rate whenever he opens an application. I have tried resetting the SMC and that hasn't worked. Anyone else have any ideas?

    What is a high rate of speed?  Install iStat pro and when the fan speed increases, post an image of iStat pro and Activity Monitor set to 'All Processes' and % CPU set to show values from high to low.
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  • Export podcast at a higher rate

    Is it possible to export a podcast at a higher bit rate than 64 kbps?
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    Open GarageBand Preferences > Export
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  • Which AAC encoding is higher quality?

    . . . 320 constant bit rate or 256 VBR? I am about to convert a large number of lossless files and want the best aac quality.

    There is a point in audio quality where most people won't notice the difference.
    for me that's about anything above a 160 bitrate.
    even in an mp3.
    and i think at a bitrate of anything above 200 only extreme audiophiles will tell the difference.
    so go with the one that takes up less space.
    unless you're really doing something where extreme quality matters. which is unlikely.

  • Dell LCD TV/Display shows only in 60Hz, can i get a higher Rate?

    i noticed when i plguued in my dell tv/display, the max rez and refresh rate is 1360x768 60Hz. is there any way i can increase the refresh rate and resolution?

    as the last person said u cant usually get more than 60 hz from lcd's. BUt that is not really a performance spec for LCD. Rather you will want to make sure your monitor has the highest response rate. (usually faster than 8ms)

  • How to handle error from parlayx21/sms/SendSms service due high rate req?

    Hi,
    I'm developing an integration with ALSB that call parlayx21/sms/SendSms for sending sms.
    It works properly if I send few sms but if I increase the rate sometimes it give me a fault with BEA-380000 Intenarnal Server Error.
    Calling from Business this service I discovered this message:
    <soapenv:Fault>
    <faultcode>soapenv:Server</faultcode>
    <faultstring/>
    <detail>
    <v2:PolicyException>
    <messageId>POL0001</messageId>
    <text>A policy error occurred. Error code is %1</text>
    <variables>Application request limit exceeded Code: 7</variables>
    </v2:PolicyException>
    </detail>
    </soapenv:Fault>
    How can I handle this problem?
    Thanks a lot.

    There's anyway in order not to lose and retry to send the messages?
    I would't use the queue.
    Many Thanks!

  • What is the best way to read high rate serial data?

    My goal is to read 14 bytes of binary data from an instrument over RS232 serial (baud 460800) at 2000 Hz. I have not gotten a high speed serial card yet so I am currently using the standard serial port (115200 baud) and reading at 400 Hz. I configure the serial port, flush the buffer then enter a while loop to read the incoming data. I have a visa read 14 bytes per interation every 0.0025 seconds (400 Hz). However it seems the sensor is spitting out data faster than labview can read it because bytes are accumilating at the port. After a while the buffer fills up and the program fails.
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    Solved!
    Go to Solution.
    Attachments:
    serial_read.jpg ‏161 KB
    serial_read.vi ‏19 KB
    bytes read.png ‏20 KB

    Here is a producer consumer approach.... not tested
    The unwrapping of the string could be done in a better way (didn't spend much time on it, not tested!! Just a quick mod from another post)
    Can't remember what is faster scan from string or match pattern or regular expression .....
    Avoid any frontpanel objects in the serial read loop to keep that thread independent from the GUI thread. Blocksize (128) should be optimized...
    EDIT: The scan loop will not work   
    Greetings from Germany
    Henrik
    LV since v3.1
    “ground” is a convenient fantasy
    '˙˙˙˙uıɐƃɐ lɐıp puɐ °06 ǝuoɥd ɹnoʎ uɹnʇ ǝsɐǝld 'ʎɹɐuıƃɐɯı sı pǝlɐıp ǝʌɐɥ noʎ ɹǝqɯnu ǝɥʇ'
    Attachments:
    ProducerConsumerData 2.vi ‏29 KB

  • How to Acquire Data at High Rate for Several Seconds?

    Hello Everybody,
    I am using a PCI 5152 with 64Megs of memory per channel. I am also using Labview 7.1 in WinXP. My PC is a Quad Processor Computer with  2GB of Ram.
    I need to acquire data for several seconds as follows: I am triggering at 1ms and for each trigger I want to save the first 200us  of data at the highest possible rate (more than 200MHz).
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    Thank you very much  in advance.
    Jhon.
    Attachments:
    Stream_To_Disk_ With_Queue.vi ‏170 KB

    Hi Jhon,
    Could you please provide a screenshot of the front panel for your VI when you run the program and receive the error (I want to know what each value is set to). Are you able to run the program without error when you decrease the record length and/or sample rate? Additionally, what are the values of the Records Fetched and Records Acquired indicators when you receive the error? Can you please provide a screenshot of the actual error message you are receiving as well? Finally, I am curious to know why you are taking your min record length value and dividing it by the period (reciprocal of min sample rate)? I look forward to hearing back from you soon and reproducing the issue you are seeing.
    Cheers!
    Daniel S.
    National Instruments

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    I'm using Quicktime Player to export movies. I'm just bothered by the fact that is says "Inactive" rather than "Active". Can someone please explain to me why I have such low Free Memory?
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  • Designing a table for high rate of concurrent inserts and selects...

    I am looking for some recommendations on designing a table the will be inserted into from both nodes of a 2 node cluster quite heavily during peak hours when we are taking alot of orders. We are an online store and we are designing a table that will be used to hold product sku's for items that are placed in a shoppers cart at the same time and then we plan to use this table as a way of subtracting the inventory in this table as a minus in a view of our true nventory quantities?
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    What other factors should I be considering.
    any help or suggestions are greatly appreciated.
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    user520056 wrote:
    I am looking for some recommendations on designing a table the will be inserted into from both nodes of a 2 node cluster quite heavily during peak hours when we are taking alot of orders. We are an online store and we are designing a table that will be used to hold product sku's for items that are placed in a shoppers cart at the same time and then we plan to use this table as a way of subtracting the inventory in this table as a minus in a view of our true nventory quantities?
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    I am looking for techniques that maybe some of our guru's have implemented in this type of design in a rac environment that will help in the conncurrency that we are expectiing.
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    The exact text and/or number of error messages is useful (!= "it didn't work!"). Thanks.
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    please do not top post and do try to trim your replies!

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