Document:

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                                                                   Exhibit 10(b)

                                 March 12, 2000

Regent Broadcasting of Victorville, Inc.
Regent Licensee of Victorville, Inc.
Regent Broadcasting of Palmdale, Inc.
Regent Licensee of Palmdale, Inc.
Regent Broadcasting of Mansfield, Inc.
Regent Licensee of Mansfield, Inc.
c/o Regent Communications, Inc.
50 East RiverCenter Blvd., Suite 180
Covington, KY 41011
Attention: Mr. Terry S. Jacobs

          RE:  ASSET EXCHANGE AGREEMENT OF EVEN DATE HEREWITH (THE "EXCHANGE
               AGREEMENT") BY AND AMONG CLEAR CHANNEL BROADCASTING, INC.
               (TOGETHER WITH CLEAR CHANNEL COMMUNICATIONS, INC., "CLEAR
               CHANNEL"), CLEAR CHANNEL BROADCASTING LICENSES, INC., CAPSTAR
               RADIO OPERATING COMPANY AND CAPSTAR TX LIMITED PARTNERSHIP, AND
               REGENT BROADCASTING OF VICTORVILLE, INC., REGENT LICENSEE OF
               VICTORVILLE, INC., REGENT BROADCASTING OF PALMDALE, INC., REGENT
               LICENSEE OF PALMDALE, INC., REGENT BROADCASTING OF MANSFIELD,
               INC. AND REGENT LICENSEE OF MANSFIELD, INC. (COLLECTIVELY
               "EXCHANGE PARTY")

Ladies and Gentlemen:

         This letter will clarify certain aspects relating to the subject
Exchange Agreement (capitalized terms not otherwise defined herein shall have
the meaning ascribed to them in the Exchange Agreement):

         1. CLOSING. Clear Channel agrees that if Clear Channel fails to
consummate the Closing on the Closing Date, provided that all of Clear Channel's
conditions precedent to its obligation to close as provided for in Article 11 of
the Exchange Agreement have been satisfied and provided further that the
Exchange Party is not in material default or breach of any of its obligations
under the Exchange Agreement and has otherwise satisfied the conditions and has
performed the obligations to be satisfied or performed by it pursuant to the
Exchange Agreement in all material respects, then, at Exchange Party's option
and in lieu of the remedies provided for in the Exchange Agreement pursuant to
Section 16.2, the Exchange Party shall be paid by Clear Channel the sum of
$6,000,000 payable in cash upon such failure by Clear Channel to consummate the
Closing within seven (7) days following a demand for payment by the Exchange
Party.

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         2. COVENANT NOT TO COMPETE

         (a) In consideration of and as an inducement for the acquisition by
Regent of WABT-FM, WQBJ-FM, WQBK-FM, WTMM-FM, WGNA-AM and WGNA-FM (the "Clear
Channel Albany Stations"), in accordance with and as provided in the Exchange
Agreement, and in order that Regent may realize the full economic value of the
intellectual property used in connection with the entertainment programing
(excluding news and public affairs) currently being broadcast by the Clear
Channel Albany Stations (the "Entertainment Programming") to be transferred to
Regent pursuant to the terms of the Exchange Agreement, Clear Channel agrees, on
behalf of itself and its affiliates and successors, that commencing on the
Closing Date and continuing for a period of three (3) years, it and each of its
affiliates and successors (each, a "Restricted Party"), will cause any radio
station owned, controlled, time brokered, or operated by any Restricted Party
which has a primary service contour (the 1.0 mV/m contour) that intersects with
the primary service contour of any of the Clear Channel Albany Stations not to
broadcast in a format of entertainment programming (excluding news and public
affairs programming) that consists primarily of music which presently, in the
future, or in the past, appears, or has appeared, on the "Country" (or any
future analogous variations or off-shoots thereof) music charts published or
compiled by Radio & Records newspaper or Billboard Newspaper, or if no longer
published or compiled by those publications, then by any similar broadcast
industry publication.

         (b) In the event any aspect of the restrictions agreed to by Clear
Channel in Paragraph 2.(a) is declared illegal or unenforceable by the FCC or
any court of competent jurisdiction, such aspect which is determined to be
illegal or unenforceable shall be amended by the FCC or such court (if either
will do so) to the extent possible to make such aspect legal and enforceable. In
the event no amendment is or can be made by the FCC or such court to make such
aspect legal and enforceable but guidance has been given as to the nature of any
modification to that aspect that would make the covenant legal and enforceable,
then at Regent's request, Clear Channel agrees to enter into an amendment of
this covenant consistent with such guidance to make the covenant legal and
enforceable, provided that such amendment does not expand the scope of Clear
Channel's obligations under this letter agreement, including but not limited to,
the obligations under Paragraph 2.(a). If the restriction as amended by the FCC
or the court or as would be amended by the parties consistent with guidance
given by the FCC or the court, in Regent's and Clear Channel's reasonable
judgment, materially and adversely alter the benefits to Regent for which it has
bargained, then Regent shall have the right to terminate this covenant. In the
event this covenant is so terminated by Regent and thereafter, within three (3)
years from the Closing Date, any Restricted Party causes any station which has a
primary service contour (the 1.0 mV/m contour) that intersects with the primary
service contour of any of the Clear Channel Albany Stations and which is owned,
controlled, time brokered or operated by it to broadcast in the "Country" format
of entertainment programming described above, then Regent shall concurrently
receive, irrespective of any ruling of illegality or unenforceability of the
covenant not to compete, a pro-rata payment from Clear Channel of $6,000,000 as
its sole remedy, equal to the percentage of the three (3) year period since the
Closing Date which is unexpired, as of the date the broadcast of such
programming is commenced. Clear Channel acknowledges and agrees

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that in the absence of such payment under these circumstances Regent will have
been damaged and Clear Channel will have been unjustly enriched because the
consideration to be paid by Regent for the Clear Channel Albany Stations
pursuant to the Exchange Agreement was arrived at upon the understanding and
agreement that Clear Channel, for a period of three years from the Closing Date,
would not be utilizing in Albany, New York the "Country" Entertainment
Programming being sold to Regent at any of Clear Channel's other Albany, New
York stations which has a primary service contour (the 1.0 mV/m contour) that
intersects with the primary service contour of any of the Clear Channel Albany
Stations.

         3. LIABILITIES ON TERMINATION OR BREACH. Clear Channel acknowledges
that the intellectual property and the rights inuring to the benefit of Regent
from the ownership thereof are of a special, unique and extraordinary character
and that damages are inadequate to compensate any breach of this Agreement.
Accordingly, in the event of a material breach by Clear Channel of its
representations, warranties, covenants and agreements under this letter with
respect to Paragraphs 2 above, Regent, provided that is not otherwise in default
hereunder, shall be entitled to, in lieu of the cash payment set forth in
Paragraph 2.(b) above, an injunction restraining any such breach or threatened
breach or to enforcement of this Agreement by a decree of specific performance
requiring Clear Channel to fulfill its obligations under this letter agreement,
in each case without the necessity of showing economic loss or other actual
damage and without bond or other security being required.

                                              Sincerely,

                                              CLEAR CHANNEL COMMUNICATIONS, INC.

                                              By: /s/ Jerome L. Kersting
                                                 -------------------------------
                                                        Jerome L. Kersting<PAGE>   1
                                                                   Exhibit 10(c)

                          LIQUIDATED DAMAGES AGREEMENT

         THIS AGREEMENT (this "Agreement") is made as of March 12, 2000 by the
Exchange Party set forth below ("Exchange Party") to and for the benefit of
Clear Channel Broadcasting, Inc., Clear Channel Broadcasting Licenses, Inc.,
Capstar Radio Operating Company, and Capstar TX Limited Partnership (together,
"Clear Channel").

                                    Recitals

         A. This is the liquidated damages agreement contemplated by Section
16.3 of the Asset Exchange Agreement (the "Exchange Agreement") of even date
herewith between Exchange Party and Clear Channel. Capitalized terms used herein
and not defined have the respective meanings set forth in the Exchange
Agreement.

         B. Section 16.3 of the Exchange Agreement provides that if Clear
Channel terminates the Exchange Agreement pursuant to Section 16.1(b) thereof
under certain circumstances entitling Clear Channel to the payment to it of
liquidated damages by Exchange Party ("LD Event"), then Exchange Party shall
pay Clear Channel as liquidated damages an amount equal to TWENTY EIGHT MILLION
DOLLARS ($28,000,000) (the "LD Amount").

         C. Section 3.2 of the Exchange Agreement provides for a Deposit to be
made by Exchange Party on the date hereof. By agreement, the Deposit is less
than the LD Amount (the amount of such difference is referred to herein as the
"Deficiency"), and Exchange Party is executing and delivering this Agreement
with respect to the Deficiency as a material condition without which Clear
Channel would not enter into the Exchange Agreement (from which Exchange Party
derives substantial benefit).

                                    Agreement

         NOW, THEREFORE, taking the foregoing into account, and for good and
valuable consideration, the receipt and sufficiency of which are hereby
acknowledged and confirmed, Exchange Party, intending to be legally bound,
hereby consents and agrees as follows for the benefit of Clear Channel:

         1. Pre-Judgment Attachment.

                  (a) In the event that the Exchange Party has failed after
demand by Clear Channel upon the occurrence of an LD event to pay all or part of
the LD Amount, Clear Channel shall have the right, subject to, to the extent
permitted by, and in accordance with applicable law in any legal proceeding in a
court of competent jurisdiction in which Clear Channel asserts the occurrence of
an LD Event and the non-payment of all or any part of the LD Amount (whether

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by complaint, counterclaim or otherwise), to secure such payment, to file for
and request an immediate judicial order of attachment before judgment against
Exchange Party in the amount of the Deficiency, together with any writs of
execution and other orders necessary to enforce such order (the "Pre-Judgment
Attachment").

                  (b) To the fullest extent permitted by applicable law,
Exchange Party hereby agrees that any court may rely upon its equitable or
common law powers (in addition to any authority granted by statute or rule) to
issue the Pre-Judgment Attachment. Without limiting the foregoing, Clear Channel
shall not be required to post any bond or provide any security as a condition of
obtaining or maintaining the Pre-Judgment Attachment, and Exchange Party waives
all such requirements to the fullest extent permitted by applicable law.

         2. Miscellaneous. The agreement of Exchange Party set forth in this
Agreement is binding and enforceable against Exchange Party subject to any
claim, counterclaim or defense which may be asserted by Exchange Party. Nothing
contained in this Agreement shall limit Clear Channel's rights with respect to
the Deposit or any other right or remedy of Seller. The provisions of Sections
17.4 (Amendments), 17.6 (Governing Law), 17.7 (Notices) and 17.10 (Severability)
are incorporated herein by this reference as if fully set forth herein.

                            [SIGNATURE PAGE FOLLOWS]

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                 SIGNATURE PAGE TO LIQUIDATED DAMAGES AGREEMENT

         IN WITNESS WHEREOF, Exchange Party has duly executed this Agreement as
of the date first above written.

EXCHANGE PARTY:                         REGENT BROADCASTING OF VICTORVILLE, INC.

                                        By: /s/ Terry S. Jacobs
                                           -------------------------------------
                                           Name: Terry S. Jacobs
                                                --------------------------------
                                           Title: Chairman
                                                 -------------------------------

                                        REGENT LICENSEE OF VICTORVILLE, INC.

                                        By: /s/ Terry S. Jacobs
                                           -------------------------------------
                                           Name: Terry S. Jacobs
                                                --------------------------------
                                           Title: Chairman
                                                 -------------------------------

                                        REGENT BROADCASTING OF PALMDALE, INC.

                                        By: /s/ Terry S. Jacobs
                                           -------------------------------------
                                           Name: Terry S. Jacobs
                                                --------------------------------
                                           Title: Chairman
                                                 -------------------------------

                                        REGENT LICENSEE OF PALMDALE, INC.

                                        By: /s/ Terry S. Jacobs
                                           -------------------------------------
                                           Name: Terry S. Jacobs
                                                --------------------------------
                                           Title: Chairman
                                                 -------------------------------

                                        REGENT BROADCASTING OF MANSFIELD, INC.

                                        By: /s/ Terry S. Jacobs
                                           -------------------------------------
                                           Name: Terry S. Jacobs
                                                --------------------------------
                                           Title: Chairman
                                                 -------------------------------

                                        REGENT LICENSEE OF MANSFIELD, INC.

                                        By: /s/ Terry S. Jacobs
                                           -------------------------------------
                                           Name: Terry S. Jacobs
                                                --------------------------------
                                           Title: Chairman
                                                 -------------------------------

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