diff --git a/src/audiomixerboard.cpp b/src/audiomixerboard.cpp
index 0576bf59..a6643b1f 100755
--- a/src/audiomixerboard.cpp
+++ b/src/audiomixerboard.cpp
@@ -82,7 +82,7 @@ CChannelFader::CChannelFader ( QWidget*     pNW,
 
     pcbSolo->setWhatsThis ( "<b>Solo:</b> With the Solo checkbox, the current "
         "audio channel can be set to solo which means that all other channels "
-        "except of the current channel are muted.<br/>"
+        "except of the current channel are muted.<br>"
         "Only one channel at a time can be set to solo." );
     pcbSolo->setAccessibleName ( "Solo button" );
 
diff --git a/src/clientsettingsdlg.cpp b/src/clientsettingsdlg.cpp
index 8f25492a..4c1fd4b8 100755
--- a/src/clientsettingsdlg.cpp
+++ b/src/clientsettingsdlg.cpp
@@ -37,24 +37,38 @@ CClientSettingsDlg::CClientSettingsDlg ( CClient* pNCliP, QWidget* parent,
         "buffer compensates for network and sound card timing jitters. The "
         "size of this jitter buffer has therefore influence on the quality of "
         "the audio stream (how many dropouts occur) and the overall delay "
-        "(the longer the buffer, the higher the delay).<br/>"
+        "(the longer the buffer, the higher the delay).<br>"
         "Dropouts in the audio stream are indicated by the light on the bottom "
         "of the jitter buffer size fader. If the light turns to red, a buffer "
-        "overrun/underrun took place and the audio stream is interrupted.<br/>"
+        "overrun/underrun took place and the audio stream is interrupted.<br>"
         "The jitter buffer setting is therefore a trade-off between audio "
-        "quality and overall delay.<br/>"
+        "quality and overall delay.<br>"
         "An auto setting of the jitter buffer size setting is available. If "
         "the check Auto is enabled, the jitter buffer is set automatically "
         "based on measurements of the network and sound card timing jitter. If "
         "the Auto check is enabled, the jitter buffer size fader is disabled "
         "(cannot be moved by the mouse)." );
 
+    QString strJitterBufferSizeTT = tr ( "In case the Auto setting of the "
+        "jitter buffer is enabled, the network buffer is set to a conservative "
+        "value to minimize the audio dropout probability. To <b>tweak the "
+        "audio delay/latency</b> it is recommended to disable the Auto "
+        "functionality and to <b>lower the jitter buffer size manually</b> by "
+        "using the slider until your personal acceptable limit of the amount "
+        "of dropouts is reached. The LED indicator will visualize the audio "
+        "dropouts by a red light" ) + TOOLTIP_COM_END_TEXT;
+
     TextNetBuf->setWhatsThis           ( strJitterBufferSize );
+    TextNetBuf->setToolTip             ( strJitterBufferSizeTT );
     GroupBoxJitterBuffer->setWhatsThis ( strJitterBufferSize );
+    GroupBoxJitterBuffer->setToolTip   ( strJitterBufferSizeTT );
     SliderNetBuf->setWhatsThis         ( strJitterBufferSize );
     SliderNetBuf->setAccessibleName    ( tr ( "Jitter buffer slider control" ) );
+    SliderNetBuf->setToolTip           ( strJitterBufferSizeTT );
     cbAutoJitBuf->setAccessibleName    ( tr ( "Auto jitter buffer switch" ) );
+    cbAutoJitBuf->setToolTip           ( strJitterBufferSizeTT );
     CLEDNetw->setAccessibleName        ( tr ( "Jitter buffer status LED indicator" ) );
+    CLEDNetw->setToolTip               ( strJitterBufferSizeTT );
 
     // sound card device
     cbSoundcard->setWhatsThis ( tr ( "<b>Sound Card Device:</b> The ASIO "
@@ -62,16 +76,24 @@ CClientSettingsDlg::CClientSettingsDlg ( CClient* pNCliP, QWidget* parent,
         "operating system. Under Linux, no sound card selection is possible "
         "(always wave mapper is shown and cannot be changed). If the selected "
         "ASIO driver is not valid an error message is shown and the previous "
-        "valid driver is selected.<br/>"
+        "valid driver is selected.<br>"
         "If the driver is selected during an active connection, the connection "
         "is stopped, the driver is changed and the connection is started again "
         "automatically." ) );
+
     cbSoundcard->setAccessibleName ( tr ( "Sound card device selector combo box" ) );
 
+    cbSoundcard->setToolTip ( tr ( "In case the <b>ASIO4ALL</b> driver is used, "
+        "please note that this driver usually introduces approx. 10-30 ms of "
+        "additional audio delay. Using a sound card with a native ASIO driver "
+        "is therefore recommended.<br>If you are using the <b>kX ASIO</b> "
+        "driver, make sure to connect the ASIO inputs in the kX DSP settings "
+        "panel." ) + TOOLTIP_COM_END_TEXT );
+
     // sound card buffer delay
     QString strSndCrdBufDelay = tr ( "<b>Sound Card Buffer Delay:</b> The "
         "buffer delay setting is a fundamental setting of the llcon software. "
-        "This setting has influence on many connection properties.<br/>"
+        "This setting has influence on many connection properties.<br>"
         "Three buffer sizes are supported:"
         "<ul>"
         "<li>128 samples: This is the preferred setting since it gives lowest "
@@ -86,37 +108,54 @@ CClientSettingsDlg::CClientSettingsDlg ( CClient* pNCliP, QWidget* parent,
         "is disabled. To change the actual buffer delay, this "
         "setting has to be changed in the sound card driver. On Windows, press "
         "the ASIO Setup button to open the driver settings panel. On Linux, "
-        "use the Jack configuration tool to change the buffer size.<br/>"
+        "use the Jack configuration tool to change the buffer size.<br>"
         "The actual buffer delay has influence on the connection status, the "
         "current upload rate and the overall delay. The lower the buffer size, "
         "the higher the probability of red light in the status indicator (drop "
         "outs) and the higher the upload rate and the lower the overall "
-        "delay.<br/>"
+        "delay.<br>"
         "The jitter buffer setting is therefore a trade-off between audio "
         "quality and overall delay." );
 
+    QString strSndCrdBufDelayTT = tr ( "If the buffer delay settings are "
+        "disabled, it is prohibited by the audio driver to modify this "
+        "setting from within the llcon software. On Windows, press "
+        "the ASIO Setup button to open the driver settings panel. On Linux, "
+        "use the Jack configuration tool to change the buffer size." ) +
+        TOOLTIP_COM_END_TEXT;
+
     rButBufferDelayPreferred->setWhatsThis ( strSndCrdBufDelay );
     rButBufferDelayPreferred->setAccessibleName ( tr ( "128 samples setting radio button" ) );
+    rButBufferDelayPreferred->setToolTip ( strSndCrdBufDelayTT );
     rButBufferDelayDefault->setWhatsThis ( strSndCrdBufDelay );
     rButBufferDelayDefault->setAccessibleName ( tr ( "256 samples setting radio button" ) );
+    rButBufferDelayDefault->setToolTip ( strSndCrdBufDelayTT );
     rButBufferDelaySafe->setWhatsThis ( strSndCrdBufDelay );
     rButBufferDelaySafe->setAccessibleName ( tr ( "512 samples setting radio button" ) );
+    rButBufferDelaySafe->setToolTip ( strSndCrdBufDelayTT );
     ButtonDriverSetup->setWhatsThis ( strSndCrdBufDelay );
     ButtonDriverSetup->setAccessibleName ( tr ( "ASIO setup push button" ) );
+    ButtonDriverSetup->setToolTip ( strSndCrdBufDelayTT );
 
     // open chat on new message
     cbOpenChatOnNewMessage->setWhatsThis ( tr ( "<b>Open Chat on New "
         "Message:</b> If this checkbox is enabled, the chat window will "
         "open on any incoming chat text if it not already opened." ) );
+
     cbOpenChatOnNewMessage->setAccessibleName ( tr ( "Open chat on new "
         "message check box" ) );
 
+    cbOpenChatOnNewMessage->setToolTip ( tr ( "If Open Chat on New Message "
+        "is disabled, a hint in the main window status bar is shown when a "
+        "new message has arrived" ) + TOOLTIP_COM_END_TEXT );
+
     // use high quality audio
     cbUseHighQualityAudio->setWhatsThis ( tr ( "<b>Use High Quality Audio</b> "
         "Enabling ""Use High Quality Audio"" will improve the audio quality "
         "by increasing the stream data rate. Make sure that the current "
         "upload rate does not exceed the available bandwidth of your "
         "internet connection." ) );
+
     cbUseHighQualityAudio->setAccessibleName ( tr ( "Use high quality audio "
         "check box" ) );
 
@@ -127,9 +166,9 @@ CClientSettingsDlg::CClientSettingsDlg ( CClient* pNCliP, QWidget* parent,
         "delay is introduced by the network. This delay should be as low as "
         "20-30 ms. If this delay is higher (e.g., 50-60 ms), your distance to "
         "the server is too large or your internet connection is not "
-        "sufficient.<br/>"
+        "sufficient.<br>"
         "The overall delay is calculated from the current ping time and the "
-        "delay which is introduced by the current buffer settings.<br/>"
+        "delay which is introduced by the current buffer settings.<br>"
         "The upstream rate depends on the current audio packet size and the "
         "audio compression setting. Make sure that the upstream rate is not "
         "higher than the available rate (check the upstream capabilities of "
@@ -141,6 +180,10 @@ CClientSettingsDlg::CClientSettingsDlg ( CClient* pNCliP, QWidget* parent,
     TextLabelOverallDelay->setWhatsThis ( strConnStats );
     TextUpstream->setWhatsThis          ( strConnStats );
     TextUpstreamValue->setWhatsThis     ( strConnStats );
+    CLEDOverallDelay->setWhatsThis      ( strConnStats );
+    CLEDOverallDelay->setToolTip ( tr ( "If this LED indicator turns red, "
+        "you will not have much fun using the llcon software..." ) +
+        TOOLTIP_COM_END_TEXT );
 
 
     // init driver button
@@ -150,6 +193,11 @@ CClientSettingsDlg::CClientSettingsDlg ( CClient* pNCliP, QWidget* parent,
     // no use for this button for Linux right now, maybe later used
     // for Jack
     ButtonDriverSetup->hide();
+
+    // for Jack interface, we cannot choose the audio hardware from
+    // within the llcon software, hide the combo box
+    TextSoundcardDevice->hide();
+    cbSoundcard->hide();
 #endif
 
     // init delay and other information controls
diff --git a/src/global.h b/src/global.h
index 3722a975..619fcd59 100755
--- a/src/global.h
+++ b/src/global.h
@@ -132,8 +132,8 @@
 // common tool tip bottom line text
 #define TOOLTIP_COM_END_TEXT            tr ( \
     "<br><div align=right><font size=-1><i>" \
-    "To get more information use the ""What's " \
-    "This"" help (? menu or Shift+F1)" \
+    "For more information use the ""What's " \
+    "This"" help (? menu, right mouse button or Shift+F1)" \
     "</i></font></div>" )
 
 #define _MAXSHORT                       32767
diff --git a/src/llconclientdlg.cpp b/src/llconclientdlg.cpp
index 1045d52e..d2954030 100755
--- a/src/llconclientdlg.cpp
+++ b/src/llconclientdlg.cpp
@@ -55,35 +55,56 @@ CLlconClientDlg::CLlconClientDlg ( CClient*        pNCliP,
         "indicators show the current input level of the two stereo channels "
         "of the current selected audio input. The upper level display belongs "
         "to the left channel and the lower level display to the right channel "
-        "of the audio input.<br/>"
+        "of the audio input.<br>"
         "Make sure not to clip the input signal to avoid distortions of the "
         "audio signal." );
+
+    QString strInpLevHTT = tr ( "If the llcon software is connected and "
+        "you play your instrument/sing in the microphone, the LED level "
+        "meter should flicker. If this is not the case, you have "
+        "probably selected the wrong input channel (e.g. line in instead "
+        "of the microphone input) or set the input gain too low in the "
+        "(Windows) audio mixer.<br>For a proper usage of the llcon software, "
+        "you should not hear your singing/instrument in the loudspeaker or "
+        "your headphone when the llcon software is not connected. This can "
+        "be achieved by muting your input audio channel in the Playback "
+        "mixer (<b>not</b> the Recording mixer!)." ) + TOOLTIP_COM_END_TEXT;
+
     QString strInpLevHAccText  = tr ( "Input level meter" );
     QString strInpLevHAccDescr = tr ( "Simulates an analog LED level meter." );
+
     TextLabelInputLevelL->setWhatsThis                    ( strInpLevH );
+    TextLabelInputLevelL->setToolTip                      ( strInpLevHTT );
     TextLabelInputLevelR->setWhatsThis                    ( strInpLevH );
+    TextLabelInputLevelR->setToolTip                      ( strInpLevHTT );
     MultiColorLEDBarInputLevelL->setWhatsThis             ( strInpLevH );
     MultiColorLEDBarInputLevelL->setAccessibleName        ( strInpLevHAccText );
     MultiColorLEDBarInputLevelL->setAccessibleDescription ( strInpLevHAccDescr );
+    MultiColorLEDBarInputLevelL->setToolTip               ( strInpLevHTT );
     MultiColorLEDBarInputLevelR->setWhatsThis             ( strInpLevH );
     MultiColorLEDBarInputLevelR->setAccessibleName        ( strInpLevHAccText );
     MultiColorLEDBarInputLevelR->setAccessibleDescription ( strInpLevHAccDescr );
+    MultiColorLEDBarInputLevelR->setToolTip               ( strInpLevHTT );
 
     // connect/disconnect button
     PushButtonConnect->setWhatsThis ( tr ( "<b>Connect / Disconnect Button:"
         "</b> Push this button to connect the server. A valid IP address has "
         "to be specified before. If the client is connected, pressing this "
         "button will disconnect the connection." ) );
-    PushButtonConnect->setAccessibleName ( tr ( "Connect and disconnect toggle button" ) );
-    PushButtonConnect->setAccessibleDescription ( tr ( "Clicking on this button "
-        "changes the caption of the button from Connect to Disconnect, i.e., it "
-        "implements a toggle functionality for connecting and disconnecting "
-        "the llcon software." ) );
+
+    PushButtonConnect->setAccessibleName (
+        tr ( "Connect and disconnect toggle button" ) );
+
+    PushButtonConnect->setAccessibleDescription ( tr ( "Clicking on this "
+        "button changes the caption of the button from Connect to "
+        "Disconnect, i.e., it implements a toggle functionality for connecting "
+        "and disconnecting the llcon software." ) );
 
     // status bar
     TextLabelStatus->setWhatsThis ( tr ( "<b>Status Bar:</b> In the status bar "
         "different messages are displayed. E.g., if an error occurred or the "
         "status of the connection is shown." ) );
+
     TextLabelStatus->setAccessibleName ( tr ( "Status bar" ) );
 
     // server address
@@ -92,8 +113,10 @@ CLlconClientDlg::CLlconClientDlg ( CClient*        pNCliP,
         "A list of the most recent used server URLs is available for "
         "selection. If an invalid address was chosen, an error message is "
         "shown in the status bar." );
+
     TextLabelServerAddr->setWhatsThis            ( strServAddrH );
     LineEditServerAddr->setWhatsThis             ( strServAddrH );
+
     LineEditServerAddr->setAccessibleName        ( tr ( "Server address edit box" ) );
     LineEditServerAddr->setAccessibleDescription ( tr ( "Holds the current server "
         "URL. It also stores old URLs in the combo box list." ) );
@@ -105,8 +128,16 @@ CLlconClientDlg::CLlconClientDlg ( CClient*        pNCliP,
         "server. This tag will also show up at each client which is connected "
         "to the same server as the local client. If the fader tag is empty, "
         "the IP address of the client is displayed instead." );
-    TextLabelServerTag->setWhatsThis    ( strFaderTag );
-    LineEditFaderTag->setWhatsThis      ( strFaderTag );
+
+    QString strFaderTagTT = tr ( "Set your name and/or instrument and/or "
+        "pseoudonym here so that the other musicians can identify you." ) +
+        TOOLTIP_COM_END_TEXT;
+
+    TextLabelServerTag->setWhatsThis ( strFaderTag );
+    TextLabelServerTag->setToolTip   ( strFaderTagTT );
+    LineEditFaderTag->setWhatsThis   ( strFaderTag );
+    LineEditFaderTag->setToolTip     ( strFaderTagTT );
+
     LineEditFaderTag->setAccessibleName ( tr ( "Fader tag edit box" ) );
 
     // local audio input fader
@@ -118,8 +149,10 @@ CLlconClientDlg::CLlconClientDlg ( CClient*        pNCliP,
         "which is much louder than the microphone, move the audio fader in "
         "a direction where the label above the fader shows <i>L -x</i>, where "
         "<i>x</i> is the current attenuation indication. " );
+
     TextAudInFader->setWhatsThis        ( strAudFader );
     SliderAudInFader->setWhatsThis      ( strAudFader );
+
     SliderAudInFader->setAccessibleName ( tr ( "Local audio input fader (left/right)" ) );
 
     // reverberation level
@@ -129,13 +162,15 @@ CLlconClientDlg::CLlconClientDlg ( CClient*        pNCliP,
         "the microphone signal is fed into the right audio channel of the "
         "sound card and a reverberation effect shall be applied, set the "
         "channel selector to right and move the fader upwards until the "
-        "desired reverberation level is reached.<br/>"
+        "desired reverberation level is reached.<br>"
         "The reverberation effect requires significant CPU so that it should "
         "only be used on fast PCs. If the reverberation level fader is set to "
         "minimum (which is the default setting), the reverberation effect is "
         "switched off and does not cause any additional CPU usage." );
+
     TextLabelAudReverb->setWhatsThis   ( strAudReverb );
     SliderAudReverb->setWhatsThis      ( strAudReverb );
+
     SliderAudReverb->setAccessibleName ( tr ( "Reverberation effect level setting" ) );
 
     // reverberation channel selection
@@ -143,6 +178,7 @@ CLlconClientDlg::CLlconClientDlg ( CClient*        pNCliP,
         "With these radio buttons the audio input channel on which the "
         "reverberation effect is applied can be chosen. Either the left "
         "or right input channel can be selected." );
+
     RadioButtonRevSelL->setWhatsThis ( strRevChanSel );
     RadioButtonRevSelL->setAccessibleName ( tr ( "Left channel selection for reverberation" ) );
     RadioButtonRevSelR->setWhatsThis ( strRevChanSel );
@@ -163,6 +199,7 @@ CLlconClientDlg::CLlconClientDlg ( CClient*        pNCliP,
         "available internet bandwidth.</li>"
         "<li>The CPU of the client or server is at 100%.</li>"
         "</ul>" ) );
+
     LEDOverallStatus->setAccessibleName ( tr ( "Overall status LED indicator" ) );