user11674: If I'm meditating for example with music and I am aware of the changes of the music that is impermanence right? If I breathe in and out that is impermanence? However, how do I see dukkha and not self (especially not self)? Dukkha can be a scratch for instance? 
One last question: In Vipassana one experiences all three characteristics, but does one also contemplate on all threes or is that a seperate meditation? Thanks in advance!

user43: Nooooooo. That's all wrong! :)))) Seriously.

If I'm meditating for example with music and I am aware of the changes of the music that is impermanence right? If I breathe in and out that is impermanence?

Not at all. Impermanence is when you try to achieve some stable state of mind and realize that it is impossible. No matter how deep you get you always have to come out and pee. That's impermanence. 

However, how do I see dukkha and not self (especially not self)? Dukkha can be a scratch for instance?

Dukkha is the feeling that something is wrong, something is missing, something is not good enough. Your feeling when you look at your meditation and you realize it's not good enough - that's dukkha. 
Not self is traditionally explained as our inability to control anything, not even thoughts. Another way to see no-self is to see how the thoughts float into one another, specifically how the thought that is watching becomes the thought being watched by the next thought. 

In Vipassana one experiences all three characteristics, but does one also contemplate on all threes or is that a separate meditation?

Don't force anything. Follow your instincts. 

user111: Do not meditate with music. It's distracting. Go to a quiet place with the least number of distractions.
There's no such thing called 'breathing'. Breathing is a concept. What you should focus on is the feeling at the nose when the air hits inside. Do not make more than what the senses can feel. All that is felt is the cold, warm, smooth or rough sensations rising and falling. Simply keep noting that. If you happen to hear something, just note it as hearing. Don't make more out of it. Same attitude with any other sensation or thought.
Do not try to thinkup impermanence, suffering and non-self. That is like digging a hole in the ground, putting water to it and calling it a water well. The proper way is to keep digging until you find water. In the same way, keep noting the sensations/thoughts and the 3 characteristics will reveal themselves when the mind is matured.
Here is a handbook for you: https://www.sirimangalo.org/text/how-to-meditate/

11674: <p>If I'm meditating for example with music and I am aware of the changes of the music that is impermanence right? If I breathe in and out that is impermanence? However, how do I see dukkha and not self (especially not self)? Dukkha can be a scratch for instance? </p>

<p>One last question: In Vipassana one experiences all three characteristics, but does one also contemplate on all threes or is that a seperate meditation? Thanks in advance!</p>
 43: <p>Nooooooo. That's all wrong! :)))) Seriously.</p>

<blockquote>
  <p>If I'm meditating for example with music and I am aware of the changes of the music that is impermanence right? If I breathe in and out that is impermanence?</p>
</blockquote>

<p>Not at all. Impermanence is when you try to achieve some stable state of mind and realize that it is impossible. No matter how deep you get you always have to come out and pee. <em>That's</em> impermanence. </p>

<blockquote>
  <p>However, how do I see dukkha and not self (especially not self)? Dukkha can be a scratch for instance?</p>
</blockquote>

<p>Dukkha is the feeling that something is wrong, something is missing, something is not good enough. Your feeling when you look at your meditation and you realize it's not good enough - that's dukkha. </p>

<p>Not self is traditionally explained as our inability to control anything, not even thoughts. Another way to see no-self is to see how the thoughts float into one another, specifically how the thought that is watching becomes the thought being watched by the next thought. </p>

<blockquote>
  <p>In Vipassana one experiences all three characteristics, but does one also contemplate on all threes or is that a separate meditation?</p>
</blockquote>

<p>Don't force anything. Follow your instincts. </p>
 111: <p>Do not meditate with music. It's distracting. Go to a quiet place with the least number of distractions.</p>

<p>There's no such thing called 'breathing'. Breathing is a concept. What you should focus on is the feeling at the nose when the air hits inside. Do not make more than what the senses can feel. All that is felt is the cold, warm, smooth or rough sensations rising and falling. Simply keep noting that. If you happen to hear something, just note it as hearing. Don't make more out of it. Same attitude with any other sensation or thought.</p>

<p>Do not try to thinkup impermanence, suffering and non-self. That is like digging a hole in the ground, putting water to it and calling it a water well. The proper way is to keep digging until you find water. In the same way, keep noting the sensations/thoughts and the 3 characteristics will reveal themselves when the mind is matured.</p>

<p>Here is a handbook for you: <a href="https://www.sirimangalo.org/text/how-to-meditate/" rel="nofollow noreferrer">https://www.sirimangalo.org/text/how-to-meditate/</a></p>
