Changing Buffer Size - Logic Tweaks Out

I find that I'm unable to change the buffer size (for instance, after I record and want to play back without any glitches) without having to quit Logic and reload the file. I usually get a message that "some plug-ins have been disabled."
Everything is usually fine after I quit the file and reload. But I'm wondering if anyone else has this issue and if it can be avoided. It's mostly just a time-waster.
Thanks.

Nevermind. Thanks.

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Changing Buffer Size

Every time I change the buffer size in audio preferences, Logic tells me that my memory is getting too low and then diagonal black lines appear across all my plug-ins. When I quit and reload, it usually works fine. Sometimes I have to quit Logic entirely and reload the project.
Not sure what's going on.

freeschaboy1 wrote:
Logic 9.1.1 with 4 GB of RAM.
I'm mostly using Miroslav Philharmonik - surprise, surprise!
I have about 10 instruments loaded, with an average of 5 channels per instrument. I suppose that's a lot.
Thanks.
There's your answer then You are likely to be running out of memory (as Logic warned you).
Some solutions that may help:
Get more memory (may not be possible for your particular Mac)
Use less/fewer memory intensive plugins.
Possibly, Miroslav P has a disk streaming option, that might at least allow you to run with less samples actually in memory.
Bounce some of the tracks to audio and remove the Instrument plugins to free up some memory.
and on...
CCT

"Streaming Buffer Size" pop-up menu does not exist under Advanced when I use iTunes - Preferences - Advanced. How can I increase buffer size?

How can I change buffer size in iTunes 10? "Streaming Buffer Size" pop-up menu does not exist under Preferences--Advanced.

Hi all, iTunes streaming victims.
I struggled long with the streaming buffer problem of iTunes and indeed could solve it with increasing the buffer size, which features has been removed in iTunes 10. And this without updating the instructions by Apple!
Here is my solutions:
http://www.rogueamoeba.com/airfoil/
perfect for all wireless audio streaming not only for itunes, but any source on the Mac.
solved the problem completely for my 3 MacBooks, 2 airports, iphones etc.
it is not for free but a very good value for money.
cheers, Wil

How to increase the buffer size for Oracle?

After I installed the patch 9.2.0.4, I kept getting 'ORA-03113: end-of-file on communication channel' error. According to the metalink, increasing the buffer size may solve this problem. I found when I set the trace on, this problem was gone, and after I set the trace off, it came back again. I am not sure if setting the trace on increases buffer size automatically or not, but I want to start from here.
No matter how easy it is, I really didn't change buffer size before, can anyone show me how to do that?
Thanks a lot.

Hi,
I think they asked to increase the db buffer cache size. You may try this
alter system set db_cache_size=<new size in bytes> scope=both;
Cheers
Muneer

What is the default buffer size if we dont specify in buffer write?

If we dont specify what is the default buffer size in BufferedWriter. How to increase/decrease the size of it?
What is the purpose of flush?
If flush() is not used, only partial content is written to the file. Is it because of the default size of the buffer.

THis is the bufferedwriter class, it helps to look at them, look at the bold underlined, thats answers your defualt buffer size
* @(#)BufferedWriter.java 1.26 03/12/19
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
package java.io;
* Write text to a character-output stream, buffering characters so as to
* provide for the efficient writing of single characters, arrays, and strings.
* The buffer size may be specified, or the default size may be accepted.
* The default is large enough for most purposes.
* A newLine() method is provided, which uses the platform's own notion of
* line separator as defined by the system property <tt>line.separator</tt>.
* Not all platforms use the newline character ('\n') to terminate lines.
* Calling this method to terminate each output line is therefore preferred to
* writing a newline character directly.
* In general, a Writer sends its output immediately to the underlying
* character or byte stream. Unless prompt output is required, it is advisable
* to wrap a BufferedWriter around any Writer whose write() operations may be
* costly, such as FileWriters and OutputStreamWriters. For example,
* <pre>
* PrintWriter out
* = new PrintWriter(new BufferedWriter(new FileWriter("foo.out")));
* </pre>
* will buffer the PrintWriter's output to the file. Without buffering, each
* invocation of a print() method would cause characters to be converted into
* bytes that would then be written immediately to the file, which can be very
* inefficient.
* @see PrintWriter
* @see FileWriter
* @see OutputStreamWriter
* @version 1.26, 03/12/19
* @author Mark Reinhold
* @since JDK1.1
public class BufferedWriter extends Writer {
private Writer out;
private char cb[];
private int nChars, nextChar;
private static int defaultCharBufferSize = 8192;
* Line separator string. This is the value of the line.separator
* property at the moment that the stream was created.
private String lineSeparator;
* Create a buffered character-output stream that uses a default-sized
* output buffer.
* @param out A Writer
*public BufferedWriter(Writer out) {*
* this(out, defaultCharBufferSize);*
* Create a new buffered character-output stream that uses an output
* buffer of the given size.
* @param out A Writer
* @param sz Output-buffer size, a positive integer
* @exception IllegalArgumentException If sz is <= 0
public BufferedWriter(Writer out, int sz) {
 super(out);
 if (sz <= 0)
 throw new IllegalArgumentException("Buffer size <= 0");
 this.out = out;
 cb = new char[sz];
 nChars = sz;
 nextChar = 0;
 lineSeparator = (String) java.security.AccessController.doPrivileged(
new sun.security.action.GetPropertyAction("line.separator"));
/** Check to make sure that the stream has not been closed */
private void ensureOpen() throws IOException {
 if (out == null)
 throw new IOException("Stream closed");
* Flush the output buffer to the underlying character stream, without
* flushing the stream itself. This method is non-private only so that it
* may be invoked by PrintStream.
void flushBuffer() throws IOException {
 synchronized (lock) {
 ensureOpen();
 if (nextChar == 0)
 return;
 out.write(cb, 0, nextChar);
 nextChar = 0;
* Write a single character.
* @exception IOException If an I/O error occurs
public void write(int c) throws IOException {
 synchronized (lock) {
 ensureOpen();
 if (nextChar >= nChars)
 flushBuffer();
 cb[nextChar++] = (char) c;
* Our own little min method, to avoid loading java.lang.Math if we've run
* out of file descriptors and we're trying to print a stack trace.
private int min(int a, int b) {
 if (a < b) return a;
 return b;
* Write a portion of an array of characters.
* Ordinarily this method stores characters from the given array into
* this stream's buffer, flushing the buffer to the underlying stream as
* needed. If the requested length is at least as large as the buffer,
* however, then this method will flush the buffer and write the characters
* directly to the underlying stream. Thus redundant
* <code>BufferedWriter</code>s will not copy data unnecessarily.
* @param cbuf A character array
* @param off Offset from which to start reading characters
* @param len Number of characters to write
* @exception IOException If an I/O error occurs
public void write(char cbuf[], int off, int len) throws IOException {
 synchronized (lock) {
 ensureOpen();
if ((off < 0) || (off > cbuf.length) || (len < 0) ||
((off + len) > cbuf.length) || ((off + len) < 0)) {
throw new IndexOutOfBoundsException();
} else if (len == 0) {
return;
 if (len >= nChars) {
 /* If the request length exceeds the size of the output buffer,
 flush the buffer and then write the data directly. In this
 way buffered streams will cascade harmlessly. */
 flushBuffer();
 out.write(cbuf, off, len);
 return;
 int b = off, t = off + len;
 while (b < t) {
 int d = min(nChars - nextChar, t - b);
 System.arraycopy(cbuf, b, cb, nextChar, d);
 b += d;
 nextChar += d;
 if (nextChar >= nChars)
 flushBuffer();
* Write a portion of a String.
* If the value of the <tt>len</tt> parameter is negative then no
* characters are written. This is contrary to the specification of this
* method in the {@linkplain java.io.Writer#write(java.lang.String,int,int)
* superclass}, which requires that an {@link IndexOutOfBoundsException} be
* thrown.
* @param s String to be written
* @param off Offset from which to start reading characters
* @param len Number of characters to be written
* @exception IOException If an I/O error occurs
public void write(String s, int off, int len) throws IOException {
 synchronized (lock) {
 ensureOpen();
 int b = off, t = off + len;
 while (b < t) {
 int d = min(nChars - nextChar, t - b);
 s.getChars(b, b + d, cb, nextChar);
 b += d;
 nextChar += d;
 if (nextChar >= nChars)
 flushBuffer();
* Write a line separator. The line separator string is defined by the
* system property <tt>line.separator</tt>, and is not necessarily a single
* newline ('\n') character.
* @exception IOException If an I/O error occurs
public void newLine() throws IOException {
 write(lineSeparator);
* Flush the stream.
* @exception IOException If an I/O error occurs
public void flush() throws IOException {
 synchronized (lock) {
 flushBuffer();
 out.flush();
* Close the stream.
* @exception IOException If an I/O error occurs
public void close() throws IOException {
 synchronized (lock) {
 if (out == null)
 return;
 flushBuffer();
 out.close();
 out = null;
 cb = null;
What Flush(); does
Example, you have a file called c, your writer is b and buffereredwriter is a. so your programs calls a, a talks to b, and b talks to c. when you call the Flush method, the information is sent to the outfile which is c immediately before you even close the file, because when you write to the file, it does not write directly, it writes to a buffer, so flush actually causes the buffer to write to file. Also if you call the close method on that file without the flush, the buffer will still get flushed.
consider BufferedWriter c = new BufferedWriter(new PrintWriter("c:\\c"));
you wrap printwriter into a buffered writer, now if you close this "connection" to the file, the buffer will get flushed, noting that all the data is sitting in the buffered and not yet in the file, and this happens if something dont break...

Logic crashing when saving buffer size change?

Logic is crashing when saving buffer size change. Is it that my Autotune Evo plug-in window is open? I've noticed some correlation but it could have nothing to do with it.

Tried this alright & seems to have fixed the problem so I am so grateful. Many thanks Pancenter!! What did you actually instruct me to do?
One of the things I previously tried was to re-install logic 9 again but strangely after I trashed it and emptied it was still present in Apps. How come this was the case... just curious??
Thanks for everything
Mark

Linux Serial NI-VISA - Can the buffer size be changed from 4096?

I am communicating with a serial device on Linux, using LV 7.0 and NI-VISA. About a year and a half ago I had asked customer support if it was possible to change the buffer size for serial communication. At that time I was using NI-VISA 3.0. In my program the VISA function for setting the buffer size would send back an error of 1073676424, and the buffer would always remain at 4096, no matter what value was input into the buffer size control. The answer to this problem was that the error code was just a warning, letting you know that you could not change the buffer size on a Linux machine, and 4096 bytes was the pre-set buffer size (unchangeable). According to the person who was helping me: "The reason that it doesn't work on those platforms (Linux, Solaris, Mac OSX) is that is it simply unavailable in the POSIX serial API that VISA uses on these operating systems."
Now I have upgraded to NI-VISA 3.4 and I am asking the same question. I notice that an error code is no longer sent when I input different values for the buffer size. However, in my program, the bytes returned from the device max out at 4096, no matter what value I input into the buffer size control. So, has VISA changed, and it is now possible to change the buffer size, but I am setting it up wrong? Or, have the error codes changed, but it is still not possible to change the buffer size on a Linux machine with NI-VISA?
Thanks,
Sam

The buffer size still can't be set, but it seems that we are no longer returning the warning. We'll see if we can get the warning back for the next version of VISA.
Thanks,
Josh

I/O Buffer Size Requires Constant Changes

Every 20 seconds or so, I have change the I/O Buffer Size to stop a crackling noise and latency. When I change it, everything sounds clear for 20 seconds, and then goes back to sounding terrible and out of sync. Any help?

it sounds like you have an issue that isn't actually directly related to the buffer size. When you chnge the buffer size, you are reinitializing core audio. Something else is happening that causes your sync issues after about 20 seconds, then reintializing clears it.
What sort of setup do you have? Do you have an aggregate device? A clock? What sorts of instruments? etc.

I'm having sever latency issues on Logic 9 through the built-in input (despite having no plugins active and 32 bit buffer size selected)

I'm literally running a guitar straight into my computer (no plugins, no interface, just the "built-in input" on my macbook) and there's a LOT of latency. I'm very experienced with Logic and pro-audio (I have logic on my other computer and it works fine) but for some reason there's a ton of delay on my signal. NO idea where to start with this one. I've examined every option within Logic and nothing seems to be helping. I've changed every parameter, including buffer size, disabling and reenabling core audio, and low-latency mode, but nothing has worked.
Any advice would be appreciated, thanks.
Also, I'm using a late 2011 15" Macbook (Quad core, 4 GB ram)

Never heard of this before... what are you using for output in Logic's Audio Prefs?
Are you on 10.7.5 as you signature says? There is a supplemental update for early builds of 10.7.5 that were released.
Take a look at the Audio portion the "Audio-MIDI Setup" in Utilities.
Bit-depth, sample frequency? Try it at 16-bit 44.1kHz. Is Logic set to the same?
What kind of cable are you using to get the guitar into Logic, the Mac audio input jack is multifunction, could you be partially enabling the digital I/O.
just tossing some ideas..

How to change font size in a call-out tool box?

Hi, the other day i inserted a call-out tool box in a PDF document, however i cannot find anything that can change the font size of the letters i input in that box. could anyone help? Thanks.
Sherman

This is a question for the Acrobat support forums – please post there.
From: Adobe Forums <[email protected]<mailto:[email protected]>>
Reply-To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>>
Date: Wed, 23 Nov 2011 10:55:07 -0800
To: Leonard Rosenthol <[email protected]<mailto:[email protected]>>
Subject: how to change font size in a call-out tool box?
Re: how to change font size in a call-out tool box?
created by danmarch<http://forums.adobe.com/people/danmarch> in PDF Language and Specifications - View the full discussion<http://forums.adobe.com/message/4043425#4043425

For the life of me, I can't find out what size a photo is in terms of inches or how to change the size of the photo[s] so I can print them. I think I read somewhere to click edit, then click adjust. Nothing there about sizing.

For the life of me, I can't find out what size a photo is in terms of inches or how to change the size of the photo[s] so I can print them. I think I read somewhere to click edit, then click adjust. I don't see anything about re-sizing when I click the adjust tab: only saturation and tint levels. Thank you.

With respect to digital images, there really is no size in inches. The size is given as number of pixels horizontally and vertically. In iPhoto '09 you click the little "i" inthe lower right side of the window and it will display information related to the selected photo, including the pixel dimensions. I do not have iPhoto '11 installed so I don't know if it is the same there.
In some applications, such as preview, it has something additional called Dots per Inch (DPI) which you would think would allow you to convert the pixel dimensions to inches. It is not a real thing, though. The DPI is determined by how large or small you have chosen to print your photo and the capabilities of your printer.
There is also something called Aspect Ratio, which is usually expressed in inches x inches such as 6x9 but that doesn't mean the size on the screen or when printed is 6x9. It is the ratio of the pixel dimensions. When cropping your photos, you will have several standard aspect ratios to choose from plus any custom ones you create.
In iPhoto '09, after you choose Print, in the Print Setting window are the settings for the size you want the photo printed. You want to shoose a setting with the same aspect ratio of your photo. Otherwise, iPhoto will resize and/or crop your photo to fit the size you have chosen.

How do I change the size of the tools and the text for the menus in Photoshop? I need a magnifying glass in order to make out what they are.

How do I change the size of the tools and the text for the menus in Photoshop? I need a magnifying glass in order to make out what they are.

Okay, I've figured it out, so I'm going to answer my own question in hopes that it may help anyone else that would like to actually be able to see what they're doing when using Photoshop CC 2014 on a high resolution screen.
1. Open Photoshop.
2. Select Preferences from the Edit Menu, then select General.
3. Change the HUD Color Picker to Hue Strip (Medium).
4. Select Interface from the Preferences menu on the left side of the dialog box.
5. Change the UI Font Size to Large in the Text area of the Preferences dialog box.
6. Select Experimental Features from the Preferences menu on the left side of the dialog box.
7. Select Scale UI 200% for high-density displays (Windows only).
8. Click on OK, then Exit/Quit Photoshop.
9. Open Photoshop and everything should be readable.

I want to change the size and color of text in call out boxes and text boxes. How can I do this? Jack

I want to change the size and color of text in call out boxes and text boxes. How can I do this? Jack

Highlite the text inside the text box and then press Ctrl+E.

Where can I change the buffer size for LKM File to Oracle (EXTRENAL TABLE)?

Hi all,
I'd a problem on the buffer size the "LKM File to Oracle (EXTRENAL TABLE)" as follow:
2801 : 72000 : java.sql.SQLException: ORA-12801: error signaled in parallel query server P000
ORA-29913: error in executing ODCIEXTTABLEFETCH callout
ORA-29400: data cartridge error
KUP-04020: found record longer than buffer size supported, 524288, in D:\OraHome_1\oracledi\demo\file\PARTIAL_SHPT_FIXED_NHF.dat
Do you know where can I change the buffer size?
Remarks: The size of the file is ~2Mb.
Tao

Hi,
The behavior is explained in Bug 4304609 .
You will encounter ORA-29400 & KUP-04020 errors if the RECORDSIZE clause in the access parameters for the ORACLE_LOADER access driver is larger than 10MB and you are loading records larger than 10MB. Which means their is a another limitation on read size of a record which is termed as granule size. If the default granule size is less then RECORDSIZE it limits the size of the read buffer to granule size.
Use the pxxtgranule_size parameter to change the size of the granule to a number larger than the size specified for the read buffer.You can use below query to determine the current size of the granule.
SELECT KSPFTCTXPN PARAMETER_NUMBER,
KSPPINM PARAMETER_NAME,
KSPPITY PARAMETER_TYPE,
KSPFTCTXVL PARAMETER_VALUE,
KSPFTCTXDF IS_DEFAULT,
KSPPIFLG MODIFICATION_FLAG,
KSPFTCTXVF VALUE_FLAG
FROM X$KSPPI X, X$KSPPCV2 Y
WHERE (X.INDX+1) = KSPFTCTXPN AND
KSPPINM LIKE '%_px_xtgranule_size%';
There is no 'ideal' or recommended value for pxxtgranule_size parameter, it is safe to increase it to work around this particular problem. You can set this parameter using ALTER SESSION/SYSTEM command.
SQL> alter system set "_px_xtgranule_size"=10000;
Thanks,
Sutirtha

12.3 and 12.4 beta. Cannot change the size of the ostream buffer with stlport.

The following program does not work as expected when compiled with -library=stlport4
#include <iostream>
using namespace std;
int main(int argc, char **argv) {
 cout.rdbuf()->pubsetbuf(new char[20*1024+1], 20*1024+1);
 cout.sync_with_stdio(false);
 for(int i=0; i!=50000; ++i)
 cout << i;
CC t.cc -library=stlport4 && truss -t write ./a.out > /dev/null
will show that it uses buffer-size of 4096
The same with 12.4.
This example will work if we exchange the order of the two cout... lines.
Without library=stlport4 it works fine.

Yes, that looks like a bug in STLport. I have filed bug 18810043 for you. If you have an Oracle Solaris Studio service contract with Oracle, you can request a fix.
The workaround is simple: move the sync_with_stdio call to the top of main.
In fact, the effect of calling sync_with-stdio after any I/O operation can vary among implementations, so doing the call first is better programming practice anyway.

Changing Buffer Size - Logic Tweaks Out

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